{"id":5629,"date":"2023-09-13T11:01:45","date_gmt":"2023-09-13T02:01:45","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=5629"},"modified":"2024-07-26T16:13:10","modified_gmt":"2024-07-26T07:13:10","slug":"sql-delete","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/sql-delete\/","title":{"rendered":"\u3010SQL\u3011\u30c7\u30fc\u30bf\u524a\u9664\u300cDELETE\u6587\u300d\u306e\u4f7f\u3044\u65b9\u3002\u5168\u4ef6\u524a\u9664\u30fb\u8907\u6570\u30c6\u30fc\u30d6\u30eb\u53c2\u7167\u3082\u89e3\u8aac"},"content":{"rendered":"<p>DELETE\u6587\u306f\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u3068\u304d\u306b\u7528\u3044\u3089\u308c\u308b\u3001SQL\u306e\u4ee3\u8868\u7684\u306a\u30af\u30a8\u30ea\uff08\u547d\u4ee4\uff09\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306fDELETE\u6587\u306e\u6982\u8981\u304b\u3089\u89e3\u8aac\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u6bd4\u8f03\u3055\u308c\u308b\u3053\u3068\u306e\u591a\u3044\u300cTRUNCATE\u6587\u300d\u3068\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u3082\u4f75\u305b\u3066\u7d39\u4ecb\u3059\u308b\u306e\u3067\u4eca\u5f8c\u306eSQL\u5b66\u7fd2\u306e\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 id=\"outline__1\" class=\"wp-block-heading\">DELETE\u6587\u3068\u306f<\/h2>\n\n\n<p>SQL\u306e\u300cDELETE\u300d\u3068\u306f\u3001\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3059\u3079\u3066\u524a\u9664\u3055\u308c\u307e\u3059\u304c\u3001WHERE\u53e5\u3092\u4f75\u7528\u3059\u308c\u3070\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30ec\u30b3\u30fc\u30c9\uff08\u884c\uff09\u306e\u307f\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<h4 id=\"outline__1_0_1\" class=\"wp-block-heading\">DELETE\u6587\u306f\u6761\u4ef6\u306b\u3042\u3066\u306f\u307e\u308b\u30ec\u30b3\u30fc\u30c9\uff08\u884c\uff09\u3092\u524a\u9664\u3059\u308b<\/h4>\n\n\n<p>DELETE\u6587\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u6761\u4ef6\u306b\u5408\u81f4\u3059\u308b\u30ec\u30b3\u30fc\u30c9\uff08\u884c\uff09\u3092\u524a\u9664\u3057\u307e\u3059\u3002\u8a72\u5f53\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u306f\u3001\u305d\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3059\u3079\u3066\u524a\u9664\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u304c\u3059\u3079\u3066\u524a\u9664\u3055\u308c\u307e\u3059\u3002\u306a\u304a\u3001\u30c7\u30fc\u30bf\u3092\u5168\u4ef6\u524a\u9664\u3057\u3066\u3082\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u67a0\u7d44\u307f\u81ea\u4f53\u306f\u6b8b\u308a\u307e\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u81ea\u4f53\u3092\u524a\u9664\u3059\u308b\u306b\u306f\u3001DROP TABLE\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n<h4 id=\"outline__1_0_2\" class=\"wp-block-heading\">DELETE\u6587\u306e\u6587\u6cd5\u30fb\u4f7f\u3044\u65b9\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3088\u3063\u3066\u7570\u306a\u308b<\/h4>\n\n\n<p>DELETE\u6587\u306e\u6587\u6cd5\u306f\u3001RDBMS\uff08\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff09\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u3082\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30a8\u30e9\u30fc\u3084\u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\u3092\u62db\u304d\u304b\u306d\u306a\u3044\u306e\u3067\u4e8b\u524d\u306b\u4f7f\u7528\u3059\u308bRDBMS\u3084\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u628a\u63e1\u3057\u3001\u4f7f\u3044\u65b9\u3092\u8abf\u3079\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<h2 id=\"outline__2\" class=\"wp-block-heading\">DELETE\u6587\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 id=\"outline__2_1\" class=\"wp-block-heading\">\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n<p><strong>\u3010\u5168\u30ec\u30b3\u30fc\u30c9\u306e\u524a\u9664\u3011<\/strong><\/p>\n\n<p>\u30c6\u30fc\u30d6\u30eb\u306b\u683c\u7d0d\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u69cb\u6587\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM \u30c6\u30fc\u30d6\u30eb\u540d;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u524a\u9664\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u3011<\/strong><\/p>\n\n<p>\u524a\u9664\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u69cb\u6587\u306b\u306a\u308a\u307e\u3059\u3002WHERE\u53e5\u306f\u3001SELECT\u6587\u3084UPDATE\u6587\u3060\u3051\u3067\u306a\u304fDELETE\u6587\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM \u30c6\u30fc\u30d6\u30eb\u540d WHERE \u6761\u4ef6;<\/strong><\/code><\/pre>\n\n\n<p><span style=\"color: #000000;\">DELETE\u6587\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3059\u308b\u5834\u5408\u306f\u5b9f\u884c\u524d\u306b<\/span><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>BEGIN;<\/strong><\/code><\/pre>\n\n\n<p><span style=\"color: #000000;\">DELE<\/span><span style=\"color: #000000;\">TE\u6587\u306e\u5b9f\u884c\u5f8c\u306b<\/span><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>ROLLBACK;<\/strong><\/code><\/pre>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3067\u304d\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<div style=\"margin-top:4%;\">\n<a href=\"https:\/\/techmania.jp\/\"><\/a><p style=\"text-align:center; text-decoration:underline black; font-weight:bold;\">\u3042\u306a\u305f\u306e<span style=\"color: red;\">\u3054\u5e0c\u671b\u306b\u6cbf\u3063\u305f\u6848\u4ef6<\/span>\u304c\u5fc5\u305a\u898b\u3064\u304b\u308a\u307e\u3059<br>\u3010\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u5411\u3051\u3011<span style=\"color: red;\">\u9ad8\u53ce\u5165<\/span>\u30fb<span style=\"color: blue;\">\u597d\u5f85\u9047<\/span>\u306e\u6848\u4ef6\u3092\u3054\u7d39\u4ecb<\/p><\/a>\n<\/div>\n<div style=\"text-align:center; margin-top:1%;\"><a href=\"https:\/\/techmania.jp\/\"><img decoding=\"async\" style=\"filter: drop-shadow(0px 0px 3px rgba(0,0,0,0.3)); width:300px;\" alt=\"TECH MANIA \u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\" src=\"https:\/\/techmania.jp\/blog\/wp-content\/uploads\/2024\/01\/fl1.png\"><\/a><\/div>\n<div>\n<a href=\"https:\/\/techmania.jp\/\"><\/a><p style=\"margin-top: 1%;text-align:center; text-decoration:underline black; font-weight:bold;\">\u226b\u307e\u305a\u306f\u7c21\u5358<span style=\"color: blue;\">60<\/span>\u79d2\u3067<span style=\"color: red;\">\u7121\u6599\u304a\u554f\u3044\u5408\u308f\u305b<\/span>\u304b\u3089\u226a<\/p><\/a>\n\n\n\n<h3 id=\"outline__2_2\" class=\"wp-block-heading\">\u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb<\/h3>\n\n\n<p>\u300cDELETE\u300d\u6587\u306e\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u3092\u89e3\u8aac\u3057\u3066\u3044\u304f\u306b\u3042\u305f\u3063\u3066\u3001\u30b5\u30f3\u30d7\u30eb\u3068\u3057\u3066\u300c\u751f\u5f92\uff08student\uff09\u300d\u30c6\u30fc\u30d6\u30eb\u3068\u300c\u30c6\u30b9\u30c8\uff08test\uff09\u300d\u3092\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/p>\n<p><strong>\u300c\u751f\u5f92\uff08student\uff09\u300d\u30c6\u30fc\u30d6\u30eb<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u79cb\u5c71<\/td><td>A<\/td><td>997<\/td><\/tr><tr><td>\u4e45\u4fdd\u7530<\/td><td>A<\/td><td>998<\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><tr><td>\u4f50\u85e4<\/td><td>B<\/td><td>1000<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>B<\/td><td>1001<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>C<\/td><td>1002<\/td><\/tr><tr><td>\u571f\u5c4b<\/td><td>C<\/td><td>1003<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p><strong>\u300c\u30c6\u30b9\u30c8\uff08test\uff09\u300d\u30c6\u30fc\u30d6\u30eb<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>ID\uff08id\uff09<\/strong><\/td><td><strong>\u82f1\u8a9e\uff08en\uff09<\/strong><\/td><td><strong>\u6570\u5b66\uff08ma\uff09<\/strong><\/td><td><strong>\u56fd\u8a9e\uff08ja\uff09<\/strong><\/td><\/tr><tr><td>997<\/td><td>80<\/td><td>70<\/td><td>90<\/td><\/tr><tr><td>998<\/td><td>100<\/td><td>100<\/td><td>100<\/td><\/tr><tr><td>1000<\/td><td>85<\/td><td>80<\/td><td>85<\/td><\/tr><tr><td>1001<\/td><td>75<\/td><td>40<\/td><td>40<\/td><\/tr><tr><td>1002<\/td><td>60<\/td><td>65<\/td><td>35<\/td><\/tr><tr><td>1003<\/td><td>90<\/td><td>95<\/td><td>90<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__2_3\" class=\"wp-block-heading\">\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u3059\u3079\u3066\u524a\u9664\u3059\u308b<\/h3>\n\n\n<p>\u30c6\u30fc\u30d6\u30eb\u306b\u542b\u307e\u308c\u308b\u30c7\u30fc\u30bf\u3059\u3079\u3066\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u300cDELETE FROM \u30c6\u30fc\u30d6\u30eb\u540d\u300d\u3068\u8a18\u8ff0\u3057\u307e\u3059\u3002\u306a\u304a\u3001\u30c7\u30fc\u30bf\u3092\u5168\u4ef6\u524a\u9664\u3057\u3066\u3082\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u67a0\u7d44\u307f\u81ea\u4f53\u306f\u6b8b\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student;<\/strong><\/code><\/pre>\n\n\n<p>\u5b9f\u884c\u5f8c\u306f\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3057\u3066\u3082\u3001\u8868\u793a\u3055\u308c\u306a\u3044\u304b\u300c\u8868\u793a\u3055\u308c\u308b\u7d50\u679c\u304c\u3042\u308a\u307e\u305b\u3093\u300d\u3068\u3044\u3046\u7d50\u679c\u304c\u51fa\u307e\u3059\u3002<\/p>\n\n\n<h3 id=\"outline__2_4\" class=\"wp-block-heading\">\u6761\u4ef6\u306b\u3042\u3066\u306f\u307e\u308b\u30ec\u30b3\u30fc\u30c9\uff08\u884c\uff09\u3092\u524a\u9664\u3059\u308b<\/h3>\n\n\n<p>DELETE\u6587\u306f\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u90e8\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u304c\u591a\u3044\u3067\u3057\u3087\u3046\u3002\u6761\u4ef6\u306f\u3001WHERE\u53e5\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u3046\u3061\u3001A\u30af\u30e9\u30b9\u306e\u751f\u5f92\u3092\u6d88\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM student WHERE class=A;<\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><tr><td>\u4f50\u85e4<\/td><td>B<\/td><td>1000<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>B<\/td><td>1001<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>C<\/td><td>1002<\/td><\/tr><tr><td>\u571f\u5c4b<\/td><td>C<\/td><td>1003<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>WHERE\u53e5\u306f\u4e0d\u7b49\u53f7\u3082\u4f7f\u3048\u307e\u3059\u3002ID\u304c1000\u4ee5\u4e0a\u306e\u751f\u5f92\u3092\u524a\u9664\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student WHERE student_no>=1000;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u79cb\u5c71<\/td><td>A<\/td><td>997<\/td><\/tr><tr><td>\u4e45\u4fdd\u7530<\/td><td>A<\/td><td>998<\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__2_5\" class=\"wp-block-heading\">\u524a\u9664\u3059\u308b\u30c7\u30fc\u30bf\u3092SELECT\u6587\u3067\u6307\u5b9a\u3059\u308b<\/h3>\n\n\n<p>\u524a\u9664\u3059\u308b\u30c7\u30fc\u30bf\u3092\u6570\u5024\u3084\u6587\u5b57\u5217\u3067\u793a\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001SERECT\u6587\u3067\u3082\u6307\u5b9a\u53ef\u80fd\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u3068\u300c\u30c6\u30b9\u30c8\u300d<span style=\"color: #000000;\">\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u30c6\u30b9\u30c8\u3092\u53d7\u3051\u3066\u3044\u306a\u3044\u751f\u5f92\u3092\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u524a\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student WHERE ID NOT IN (SELECT id FROM test);<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u79cb\u5c71<\/td><td>A<\/td><td>997<\/td><\/tr><tr><td>\u4e45\u4fdd\u7530<\/td><td>A<\/td><td>998<\/td><\/tr><tr><td>\u4f50\u85e4<\/td><td>B<\/td><td>1000<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>B<\/td><td>1001<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>C<\/td><td>1002<\/td><\/tr><tr><td>\u571f\u5c4b<\/td><td>C<\/td><td>1003<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__2_6\" class=\"wp-block-heading\">\u4e0a\u4f4d\uff0f\u4e0b\u4f4d\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b<\/h3>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">DELETE\u6587\u306f\u300cORDER BY\u300d\u53e5\u3092\u4f7f\u3046\u3053\u3068\u3067\u6700\u5927\u5024\u3084\u6700\u5c0f\u5024\u306a\u3069\u3001\u4e0a\u4f4d\u307e\u305f\u306f\u4e0b\u4f4d\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\">ID\u304c1000\u4ee5\u4e0a\u306e\u751f\u5f92\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student WHERE 1000 &lt; student_no ORDER BY student_no;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u79cb\u5c71<\/td><td>A<\/td><td>997<\/td><\/tr><tr><td>\u4e45\u4fdd\u7530<\/td><td>A<\/td><td>998<\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p><span style=\"color: #000000;\">\u203bID\u304c\u4e3b\u30ad\u30fc\u306e\u5834\u5408\u306f\u3001\u521d\u671f\u72b6\u614b\u3067ID\u306f\u6607\u9806\u3067\u4e26\u3076\u305f\u3081\u3001\u53b3\u5bc6\u306b\u306f\u300cORDER BY\u300d\u306f\u4e0d\u8981\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u307e\u305f\u3001\u300cLIMIT\u300d\u3092\u4f7f\u3063\u3066\u4ef6\u6570\u3092\u7d5e\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u300c\u30c6\u30b9\u30c8\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u82f1\u8a9e\u306e\u70b9\u6570\u3092\u964d\u9806\u306b\u4e26\u3079\u3066\u4e0a\u4f4d3\u4ef6\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM test ORDER BY en DESC LIMIT 3;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>ID\uff08id\uff09<\/strong><\/td><td><strong>\u82f1\u8a9e\uff08en\uff09<\/strong><\/td><td><strong>\u6570\u5b66\uff08ma\uff09<\/strong><\/td><td><strong>\u56fd\u8a9e\uff08ja\uff09<\/strong><\/td><\/tr><tr><td>998<\/td><td>100<\/td><td>100<\/td><td>100<\/td><\/tr><tr><td>1003<\/td><td>90<\/td><td>95<\/td><td>90<\/td><\/tr><tr><td>1000<\/td><td>85<\/td><td>80<\/td><td>85<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>\u300cDESC\u300d\u3092\u300cASC\u300d\u306b\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u3067\u6607\u9806\u306b\u306a\u308a\u3001\u4e0a\u4f4d3\u4ef6\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<h3 id=\"outline__2_7\" class=\"wp-block-heading\">\u524d\u65b9\u4e00\u81f4\u3084\u5f8c\u65b9\u4e00\u81f4\u3067\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u524a\u9664\u3059\u308b<\/h3>\n\n\n<p><span style=\"color: #000000;\">\u524d\u65b9\u4e00\u81f4\u3084\u5f8c\u65b9\u4e00\u81f4\u3068\u3044\u3063\u305f\u524a\u9664\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u6c0f\u540d\u304c\u300c\u7530\u300d\u3067\u7d42\u308f\u308b\u751f\u5f92\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/span><\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student WHERE name LIKE '%\u7530';<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u79cb\u5c71<\/td><td>A<\/td><td>997<\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><tr><td>\u4f50\u85e4<\/td><td>B<\/td><td>1000<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>B<\/td><td>1001<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>C<\/td><td>1002<\/td><\/tr><tr><td>\u571f\u5c4b<\/td><td>C<\/td><td>1003<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__2_8\" class=\"wp-block-heading\">\u91cd\u8907\u3059\u308b\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b<\/h3>\n\n\n<p><span style=\"color: #000000;\">\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u30c7\u30fc\u30bf\u304c\u91cd\u8907\u3059\u308b\u306e\u3092\u907f\u3051\u308b\u306b\u306f\u300cJOIN\u300d\u53e5\u3092\u4f7f\u3044\u307e\u3059\u3002<\/span><\/p>\n<p>\u30c6\u30b9\u30c8\u3092\u53d7\u3051\u305f\u751f\u5f92\u3092\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<p>\uff08\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u3068\u300c\u30c6\u30b9\u30c8\u300d\u30c6\u30fc\u30d6\u30eb\u306e2\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5171\u901a\u3059\u308b\u30c7\u30fc\u30bf\u3092\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u524a\u9664\u3059\u308b\uff09<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE student FROM student INNER JOIN test WHERE student.student_no = test.id;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u30af\u30e9\u30b9\uff08class\uff09<\/strong><\/td><td><strong>\u5b66\u7c4d\u756a\u53f7\uff08student_no\uff09<\/strong><\/td><\/tr><tr><td>\u4f50\u3005\u6728<\/td><td>B<\/td><td>999<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__2_9\" class=\"wp-block-heading\">DELETE\u306b\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u4f7f\u7528<\/h3>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u82f1\u8a9e\u306e\u70b9\u6570\u304c\u5e73\u5747\u70b9\u4ee5\u4e0b\u306e\u751f\u5f92\u3092\u524a\u9664\u3057\u307e\u3059\u3002\u307e\u305a\u306f\u5e73\u5747\u70b9\u4ee5\u4e0b\u306e\u751f\u5f92\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>SERECT student_no FROM student WHERE en &lt; (SELECT AVG(en) FROM test);<\/strong><\/code><\/pre>\n\n\n<p><span style=\"color: #000000;\">\u3053\u308c\u3092WHERE\u53e5\u306b\u5165\u308c\u308b\u3068\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u542b\u3080SELECT\u6587\u306b\u306a\u308a\u3001\u82f1\u8a9e\u306e\u70b9\u6570\u304c\u5e73\u5747\u70b9\u4ee5\u4e0b\u306e\u751f\u5f92\u3092\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>SERECT 1 FROM student WHERE student_no IN\n SERECT student_no FROM student WHERE en &lt;\n (SELECT AVG(en) FROM test)\n );<\/strong><\/code><\/pre>\n\n\n<p><span style=\"color: #000000;\">\u300c<span style=\"font-size: revert;\">SELECT 1\u300d\u3092\u300cDELETE\u300d\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068<\/span><span style=\"font-size: revert;\">\u5e73\u5747\u70b9\u4ee5\u4e0b\u306e\u751f\u5f92\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>DELETE FROM student WHERE student_no IN SERECT student_no FROM student WHERE en &lt; (SELECT AVG(en) FROM test) );<\/strong><\/code><\/pre>\n\n\n\n<h3 id=\"outline__2_10\" class=\"wp-block-heading\">\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\uff08\u5217\uff09\u3092\u524a\u9664\u3059\u308b\u5834\u5408<\/h3>\n\n\n<p>DELETE\u6587\u3067\u306f\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\uff08\u5217\uff09\u306e\u30c7\u30fc\u30bf\u306e\u307f\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u305f\u3060\u3001UPDATE\u6587\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092NULL\u5024\u3084\u7a7a\u767d\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><code><strong>UPDATE test SET en = NULL;<\/strong><\/code><\/pre>\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>ID\uff08id\uff09<\/strong><\/td><td><strong>\u82f1\u8a9e\uff08en\uff09<\/strong><\/td><td><strong>\u6570\u5b66\uff08ma\uff09<\/strong><\/td><td><strong>\u56fd\u8a9e\uff08ja\uff09<\/strong><\/td><\/tr><tr><td>997<\/td><td>NULL<\/td><td>70<\/td><td>90<\/td><\/tr><tr><td>998<\/td><td>NULL<\/td><td>100<\/td><td>100<\/td><\/tr><tr><td>999<\/td><td>NULL<\/td><td>60<\/td><td>70<\/td><\/tr><tr><td>1000<\/td><td>NULL<\/td><td>80<\/td><td>85<\/td><\/tr><tr><td>1001<\/td><td>NULL<\/td><td>40<\/td><td>40<\/td><\/tr><tr><td>1002<\/td><td>NULL<\/td><td>65<\/td><td>35<\/td><\/tr><tr><td>1003<\/td><td>NULL<\/td><td>95<\/td><td>90<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"outline__3\" class=\"wp-block-heading\">DELETE\u6587\u3092\u4f7f\u7528\u3059\u308b\u4e0a\u3067\u306e\u6ce8\u610f\u70b9<\/h2>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">DELETE\u6587\u3092\u4f7f\u3046\u4e0a\u3067\u3001\u7559\u610f\u3059\u3079\u304d\u70b9\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<h3 id=\"outline__3_1\" class=\"wp-block-heading\">\u7279\u5b9a\u306e\u90e8\u5206\u3060\u3051\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044<\/h3>\n\n\n<p><span style=\"color: #000000;\">DELETE\u6587\u306f\u3001\u6761\u4ef6\u306b\u8a72\u5f53\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u3054\u3068\u524a\u9664\u3059\u308b\u305f\u3081\u3001\u8a72\u5f53\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u7279\u5b9a\u306e\u5217\u306b\u683c\u7d0d\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3060\u3051\u3092\u524a\u9664\u3059\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3060\u3001\u305d\u306e\u7b87\u6240\u304c\u300cNULL\u300d\u3067\u3082\u3044\u3044\u3068\u3044\u3046\u5834\u5408\u306fUPDATE\u6587\u3092\u6d3b\u7528\u3057\u3066\u3001\u5024\u3092NULL\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n\n\n<h3 id=\"outline__3_2\" class=\"wp-block-heading\">\u5217\u306e\u524a\u9664\u306b\u306f\u4f7f\u3048\u306a\u3044<\/h3>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">DELETE\u6587\u306f\u30ec\u30b3\u30fc\u30c9\uff08\u884c\uff09\u3054\u3068\u306e\u524a\u9664\u3067\u3042\u3063\u3066\u30ab\u30e9\u30e0\uff08\u5217\uff09\u3054\u3068\u306e\u524a\u9664\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u305d\u306e\u5834\u5408\u306fALTER TABLE\u6587\u306b\u300cDROP \u30ab\u30e9\u30e0\u540d\u300d\u3067\u884c\u306a\u3048\u307e\u3059\u3002<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3060\u3001\u30ab\u30e9\u30e0\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u6b21\u306e\u3088\u3046\u306a\u4e0d\u90fd\u5408\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u30ab\u30e9\u30e0\u3092\u524a\u9664\u3059\u308b\u969b\u306f\u5341\u5206\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<ul>\n<li>\u307b\u304b\u306e\u30c6\u30fc\u30d6\u30eb\u3084\u30d3\u30e5\u30fc\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3067\u304d\u306a\u304f\u306a\u308a\u3001\u6b63\u5e38\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3067\u304d\u306a\u304f\u306a\u308b<\/li>\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3067\u304d\u305a\u3001\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u306a\u304f\u306a\u308b<\/li>\n<\/ul>\n\n\n<h3 id=\"outline__3_3\" class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u3092\u6b63\u3057\u304f\u524a\u9664\u3067\u304d\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/h3>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">WHERE\u53e5\u3067\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\u306f\u3001\u307e\u305aSELECT\u6587\u3067\u62bd\u51fa\u3055\u308c\u308b\u30c7\u30fc\u30bf\u304c\u610f\u56f3\u3057\u305f\u3082\u306e\u3067\u3042\u308b\u304b\u78ba\u8a8d\u3092\u53d6\u3063\u3066\u304b\u3089DELETE\u6587\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002\u306f\u3058\u3081\u304b\u3089DELETE\u6587\u3092\u4f7f\u3046\u3068\u3001\u524a\u9664\u5bfe\u8c61\u3092\u8aa4\u3063\u3066\u3044\u305f\u5927\u304d\u306a<\/span><\/span><span style=\"color: #000000;\">\u5834\u5408\u30c7\u30fc\u30bf\u304c\u7121\u304f\u306a\u308a\u3001\u6d88\u3059\u3079\u304d\u3067\u306a\u3044\u30c7\u30fc\u30bf\u3092\u8aa4\u3063\u3066\u6d88\u53bb\u3057\u3066\u3057\u307e\u3046\u3068\u5927\u304d\u306a\u30c8\u30e9\u30d6\u30eb\u306b\u306a\u308a\u304b\u306d\u307e\u305b\u3093\u3002<\/span><\/p>\n\n\n<h3 id=\"outline__3_4\" class=\"wp-block-heading\">\u524a\u9664\u3059\u308b\u30c7\u30fc\u30bf\u304c\u307b\u304b\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5f71\u97ff\u3057\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/h3>\n\n\n<p><span style=\"color: #000000;\">\u524a\u9664\u3059\u308b\u524d\u306b\u30c7\u30fc\u30bf\u304c\u307b\u304b\u306e\u30c6\u30fc\u30d6\u30eb\u3084\u30d3\u30e5\u30fc\u304b\u3089\u53c2\u7167\u3055\u308c\u3066\u3044\u308b\u3068\u3001\u524a\u9664\u5f8c\u306b\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u306e\u3067\u524a\u9664\u3057\u3066\u3082\u554f\u984c\u304c\u306a\u3044\u304b\u5341\u5206\u306b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u5b9f\u52d9\u3067\u306f\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u30c6\u30fc\u30d6\u30eb\u306b\u300c\u524a\u9664\u30d5\u30e9\u30b0\u300d\u3068\u3044\u3046\u30ab\u30e9\u30e0\u3092\u7acb\u3066\u308b\u65b9\u6cd5\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002\u3053\u308c\u306f\u5b9f\u969b\u306b\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u300c\u7269\u7406\u524a\u9664\u300d\u3068\u306f\u7570\u306a\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u524a\u9664\u6e08\u307f\u300d\u3068\u3044\u3046\u30de\u30fc\u30af\u3092\u3064\u3051\u308b\u300c\u8ad6\u7406\u524a\u9664\u300d\u3068\u3044\u3046\u65b9\u6cd5\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u300c\u30c7\u30fc\u30bf\u306f\u6b8b\u3063\u3066\u3044\u308b\u3051\u3069\u3001\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u306f\u524a\u9664\u3055\u308c\u305f\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u6271\u3044\u306b\u306a\u308a\u307e\u3059\u3002\u8ad6\u7406\u524a\u9664\u3067\u3042\u308c\u3070\u3001\u5fa9\u6d3b\u304c\u5bb9\u6613\u3067\u3059\u304c\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6b8b\u3059\u3053\u3068\u3067\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u3053\u3068\u3082\u3042\u308b\u3068\u3044\u3046\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u904e\u53bb\u306e\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3082\u306e\u3084\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u5f71\u97ff\u3059\u308b\u7bc4\u56f2\u304c\u5927\u304d\u3044\u30c7\u30fc\u30bf\u306b\u3053\u306e\u65b9\u6cd5\u304c\u3088\u304f\u7528\u3044\u3089\u308c\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u3001\u524a\u9664\u30d5\u30e9\u30b0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u8003\u3048\u307e\u3057\u3087\u3046\u3002<\/span><\/span><\/p>\n\n\n<h2 id=\"outline__4\" class=\"wp-block-heading\">DELETE\u6587\u3068TRUNCATE\u6587\u3068\u306e\u9055\u3044<\/h2>\n\n\n<p>TRUNCATE\u6587\u3082DELETE\u6587\u3068\u540c\u69d8\u306b\u3001\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u306e\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u4e21\u8005\u306b\u306f\u76f8\u9055\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>DELETE\u6587<span style=\"color: #000000;\">\u306f\u3001<\/span><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0(*)\u306b\u30c7\u30fc\u30bf\u306e\u8a18\u9332\u3092\u884c\u3063\u305f\u4e0a\u3067\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u306e\u3067\u3001\u8aa4\u3063\u3066\u524a\u9664\u3057\u3066\u3057\u307e\u3063\u305f\u5834\u5408\u3067\u3082\u5b9f\u884c\u524d\u3067\u3042\u308c\u3070\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3067\u623b\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u90e8\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/span><\/span><\/p>\n<p>TRUNCATE\u6587\u306f\u3001\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u969b\u306b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306b\u8a18\u9332\u3057\u306a\u3044\u305f\u3081\u3001\u4e00\u5ea6\u5b9f\u884c\u3059\u308b\u3068\u5b9f\u884c\u524d\u306e\u72b6\u614b\u306b\u623b\u3059\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u3067\u3082\u3059\u3070\u3084\u304f\u52d5\u4f5c\u3057\u307e\u3059\u3001\u4e00\u5ea6\u5b9f\u884c\u3059\u308b\u3068\u3082\u3068\u306b\u623b\u305b\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u90e8\u306e\u307f\u3092\u524a\u9664\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<div class=\"bgBox\">\n<p>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5909\u66f4\u5c65\u6b74\u3092\u8a18\u9332\u3057\u305f\u3082\u306e\u3067\u30b9\u30c8\u30ec\u30fc\u30b8\u4e0a\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u8a18\u9332\u3055\u308c\u308b\u5834\u5408\u304c\u591a\u3044\u3002<\/p>\n<\/div>\n\n\n<h2 id=\"outline__5\" class=\"wp-block-heading\">SQL\u306e\u52c9\u5f37\u65b9\u6cd5\u306f\uff1f<\/h2>\n\n\n<p>\u66f8\u7c4d\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u5b66\u7fd2\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6628\u4eca\u3067\u306f\u3001YouTube\u306a\u3069\u306e\u52d5\u753b\u30b5\u30a4\u30c8\u3084\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30b5\u30a4\u30c8\u306a\u3069\u3082\u5145\u5b9f\u3057\u3066\u3044\u3066\u591a\u304f\u306e\u60c5\u5831\u304c\u624b\u306b\u5165\u308a\u307e\u3059\u3002<br \/>\u305d\u3057\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3059\u308b\u306b\u306f\u3001\u77e5\u8b58\u3092\u3064\u3051\u306a\u304c\u3089\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u308b\u306a\u3069\u3001\u30a4\u30f3\u30d7\u30c3\u30c8\u3068\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u72ec\u5b66\u306e\u5834\u5408\u306f\u3001\u6709\u8b58\u8005\u306b\u8cea\u554f\u304c\u3067\u304d\u305f\u308a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u3082\u3089\u3048\u308b\u3088\u3046\u306a\u74b0\u5883\u304c\u3042\u308b\u3068\u3001\u7406\u89e3\u5ea6\u304c\u6df1\u307e\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u305f\u3060\u3001SQL\u306b\u9650\u3089\u305a\u3001IT\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u308b\u969b\u3001\u3069\u3046\u3057\u3066\u3082\u8ab2\u984c\u306b\u3076\u3064\u304b\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u3088\u306d\u3002\u7279\u306b\u72ec\u5b66\u3060\u3068\u3001\u308f\u304b\u3089\u306a\u3044\u90e8\u5206\u3092\u30d7\u30ed\u306b\u8cea\u554f\u3067\u304d\u308b\u6a5f\u4f1a\u3092\u78ba\u4fdd\u3057\u306b\u304f\u304f\u3001\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u304c\u7d9a\u304d\u306b\u304f\u3044\u3068\u3044\u3046\u5074\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u72ec\u5b66\u3067\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u7dad\u6301\u3059\u308b\u81ea\u4fe1\u304c\u306a\u3044\u4eba\u306b\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3068\u3044\u3046\u624b\u3082\u3042\u308a\u307e\u3059\u3002\u8cbb\u7528\u306f\u639b\u304b\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u3084\u3059\u3044\u3067\u3059\u3002\u3057\u3063\u304b\u308a\u3068\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3057\u3066\u5b9f\u8df5\u306b\u6d3b\u304b\u3057\u305f\u3044\u3068\u3044\u3046\u4eba\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<p><span class=\"markerYellow\"><strong>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u306a\u3089\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u304c\u304a\u3059\u3059\u3081\uff01<\/strong><\/span><\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/yuudou.png\" class=\"post-img\">\n\n\n<p>IT\u30b9\u30ad\u30eb\u9700\u8981\u306e\u9ad8\u307e\u308a\u3068\u3068\u3082\u306b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3082\u5897\u3048\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u3069\u306e\u30b9\u30af\u30fc\u30eb\u306b\u901a\u3046\u3079\u304d\u304b\u8ff7\u3063\u3066\u3057\u307e\u3046\u4eba\u3082\u3044\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u3093\u306a\u65b9\u306b\u306f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\uff01\u3053\u308c\u307e\u3067\u591a\u304f\u306eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u80b2\u6210\u30fb\u8f29\u51fa\u3057\u3066\u304d\u305f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3092\u958b\u8b1b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"bgBox\">\n<p><strong>\uff1c\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306e\u7279\u5fb4\uff1e<\/strong><br \/><strong>\u30fb\u305f\u3057\u304b\u306a\u80b2\u6210\u5b9f\u7e3e\u3068\u89aa\u8eab\u306a\u6559\u80b2\u3000\uff5e\u30bb\u30ab\u30f3\u30c9\u30ad\u30e3\u30ea\u30a2\u3092\u5168\u529b\u652f\u63f4\uff5e<\/strong><br \/><strong>\u30fb\u8b1b\u5e2b\u304c\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u3000\uff5e\u201c\u672c\u5f53\u201d\u306e\u958b\u767a\u30ce\u30a6\u30cf\u30a6\u3092\u76f4\u306b\u5b66\u3079\u308b\uff5e<\/strong><br \/><strong>\u30fb\u5c02\u5c5e\u8b1b\u5e2b\u304c\u5b66\u7fd2\u3092\u5fb9\u5e95\u30b5\u30dd\u30fc\u30c8\u3000\uff5e\u300c\u308f\u304b\u3089\u306a\u3044\u300d\u3092\u5fb9\u5e95\u89e3\u6c7a\uff5e<\/strong><br \/><strong>\u30fb\u5b9f\u52d9\u30d9\u30fc\u30b9\u3067\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3000\uff5e\u5b9f\u8df5\u7684\u306a\u51dd\u7e2e\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0\uff5e<\/strong><\/p>\n<\/div>\n<p>\u3053\u306e\u3088\u3046\u306a\u7279\u5fb4\u3092\u6301\u3064\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306fIT\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b9\u30bf\u30fc\u30c8\u30e9\u30a4\u30f3\u3068\u3057\u3066\u6700\u9069\u3067\u3059\u3002<br \/>\u8a71\u3092\u805e\u304d\u305f\u3044\u30fb\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306f<a href=\"https:\/\/techmania.jp\/lp\/2\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089<\/a>\u304b\u3089\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<h2 id=\"outline__6\" class=\"wp-block-heading\">SQL\u95a2\u9023\u8a18\u4e8b<\/h2>\n\n\n<div class=\"bgBox\">\n<ul>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql0002\/\" target=\"_blank\" rel=\"noopener\">RDB\u3092\u64cd\u4f5c\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a00\u8a9e<strong>\u300cSQL\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/nosql-notonlysql\/\" target=\"_blank\" rel=\"noopener\">RDB\u4ee5\u5916\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<strong>\u300cNoSQL\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/post-3185\/\" target=\"_blank\" rel=\"noopener\">RDB\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<strong>\u300cMySQL\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/postgresql\/\" target=\"_blank\" rel=\"noopener\">RDB\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<strong>\u300cPostgreSQL\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-server\/\" target=\"_blank\" rel=\"noopener\">RDB\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<strong>\u300cSQL Server\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sqlite\/\" target=\"_blank\" rel=\"noopener\">RDB\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0<strong>\u300cSQLite\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-phpmyadmin\/\" target=\"_blank\" rel=\"noopener\">\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067MySQL\u3092\u7ba1\u7406\u3067\u304d\u308b<strong>\u300cphpMyAdmin\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-select\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3059\u308b<strong>\u300cSELECT\u300d<\/strong>\u6587<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-insert\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3059\u308b<strong>\u300cINSERT\u300d<\/strong>\u6587<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-delete\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b<strong>\u300cDELETE\u300d<\/strong>\u6587<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-update\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u3092\u66f4\u65b0\u3059\u308b<strong>\u300cUPDATE\u300d<\/strong>\u6587<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-alter-table\/\" target=\"_blank\" rel=\"noopener\">\u30c6\u30fc\u30d6\u30eb\u69cb\u9020\u3092\u5909\u66f4\u3059\u308b<strong>\u300cALTER TABLE\u300d<\/strong>\u6587<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql0003\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b<strong>\u300cWHERE\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-having\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b<strong>\u300cHAVING\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql0004\/\" target=\"_blank\" rel=\"noopener\">\u8907\u6570\u306e\u62bd\u51fa\u6761\u4ef6\u3092\u307e\u3068\u3081\u308b<strong>\u300cIN\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-distinct\/\" target=\"_blank\" rel=\"noopener\">\u91cd\u8907\u30ec\u30b3\u30fc\u30c9\u3092\u9664\u5916\u3059\u308b<strong>\u300cDISTINCT\u300d<\/strong><\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql0005\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u7bc4\u56f2\u3092\u6307\u5b9a\u3059\u308b<strong>\u300cBETWEEN\u300d<\/strong>\u6f14\u7b97\u5b50<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-exists\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30ec\u30b3\u30fc\u30c9\u306e\u5b58\u5728\u306e\u6709\u7121\u3092\u8abf\u3079\u308b<strong>\u300cEXISTS\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-count\/\" target=\"_blank\" rel=\"noopener\">\u30ec\u30b3\u30fc\u30c9\u4ef6\u6570\u3092\u53d6\u5f97\u3059\u308b\u96c6\u8a08\u95a2\u6570<strong>\u300cCOUNT\u300d<\/strong>\u95a2\u6570<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-group-by\/\" target=\"_blank\" rel=\"noopener\">\u30ec\u30b3\u30fc\u30c9\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b<strong>\u300cGROUP BY\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-order-by\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u7d50\u679c\u3092\u4e26\u3073\u66ff\u3048\u308b<strong>\u300cORDER BY\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-join\/\" target=\"_blank\" rel=\"noopener\">\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3059\u308b<strong>\u300cJOIN\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-inner-join\/\" target=\"_blank\" rel=\"noopener\">\u5185\u90e8\u7d50\u5408<strong>\u300cINNER JOIN\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-union\/\" target=\"_blank\" rel=\"noopener\">\u62bd\u51fa\u7d50\u679c\u3092\u7d71\u5408\u3057\u3066\u8868\u793a\u3059\u308b<strong>\u300cUNION\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-like\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u306e\u66d6\u6627\u691c\u7d22<strong>\u300cLIKE\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-limit\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u4ef6\u6570\u3092\u5236\u9650\u3059\u308b<strong>\u300cLIMIT\u300d<\/strong>\u53e5<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-case\/\" target=\"_blank\" rel=\"noopener\">\u6761\u4ef6\u5206\u5c90\u51e6\u7406<strong>\u300cCASE\u300d<\/strong>\u5f0f<\/a><\/span><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-null\/\" target=\"_blank\" rel=\"noopener\"><strong>\u300cNULL\u300d<\/strong>\u306e\u6271\u3044\u65b9<\/a><\/span><\/li>\n<li><a href=\"https:\/\/techmania.jp\/blog\/sql-primary-key\/\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"color: #000000;\">\u300c\u4e3b\u30ad\u30fc\u300d<\/span><\/strong><span style=\"color: #000000;\">\u3068\u306f\uff1f<\/span><\/a><\/li>\n<li><span style=\"color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/techmania.jp\/blog\/sql-foreign-key\/\" target=\"_blank\" rel=\"noopener\"><strong>\u300c\u5916\u90e8\u30ad\u30fc\u300d<\/strong>\u3068\u306f\uff1f<\/a><\/span><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"DELETE\u6587\u306f\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u3068\u304d\u306b\u7528\u3044\u3089\u308c\u308b\u3001SQL\u306e\u4ee3\u8868\u7684\u306a\u30af\u30a8\u30ea\uff08\u547d\u4ee4\uff09\u306e\u4e00\u3064\u3067\u3059\u3002 \u672c\u8a18\u4e8b\u3067\u306fDELETE\u6587\u306e\u6982\u8981\u304b\u3089\u89e3\u8aac\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u6bd4\u8f03\u3055\u308c\u308b\u3053\u3068\u306e\u591a\u3044\u300cTRUNCATE\u6587\u300d\u3068\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u3082\u4f75\u305b\u3066\u7d39\u4ecb\u3059\u308b\u306e\u3067\u4eca\u5f8c\u306eSQL\u5b66\u7fd2\u306e\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002 DELETE\u6587\u3068\u306f SQL\u306e\u300cDELETE\u300d\u3068\u306f\u3001\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3059\u3079\u3066\u524a\u9664\u3055\u308c [&hellip;]","protected":false},"author":8,"featured_media":5633,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5629","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/5629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/comments?post=5629"}],"version-history":[{"count":19,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/5629\/revisions"}],"predecessor-version":[{"id":7443,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/5629\/revisions\/7443"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/media\/5633"}],"wp:attachment":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/media?parent=5629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/categories?post=5629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/tags?post=5629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}