{"id":5539,"date":"2023-09-08T17:35:24","date_gmt":"2023-09-08T08:35:24","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=5539"},"modified":"2025-07-03T18:25:06","modified_gmt":"2025-07-03T09:25:06","slug":"sql-join","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/sql-join\/","title":{"rendered":"\u3010SQL\u5165\u9580\u3011JOIN\u3067SQL\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\uff08INNER JOIN, OUTER JOIN\uff09"},"content":{"rendered":"<p>SQL\u3067\u306f\u300cJOIN\u300d\u53e5\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u30921\u3064\u306b\u7d50\u5408\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u64cd\u4f5c\u306f\u96c6\u8a08\u3084\u8907\u6570\u7b87\u6240\u306b\u5206\u6563\u3057\u305f\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002JOIN\u53e5\u306b\u306f5\u7a2e\u985e\u3042\u308a\u3001\u53d6\u5f97\u3059\u308b\u30c7\u30fc\u30bf\u306e\u6027\u8cea\u3084\u7528\u9014\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u300cJOIN\u300d\u53e5\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3068\u3001\u305d\u306e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2 id=\"outline__1\" class=\"wp-block-heading\">JOIN\u53e5\u3068\u306f<\/h2>\n\n\n<p><span style=\"color: #000000;\">SQL\u306e\u300cJOIN\u300d\u53e5\u306f\u3001\u95a2\u9023\u3059\u308b\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u95a2\u9023\u4ed8\u3051\u308b\u300c\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u300d\u3092\u884c\u3046\u30af\u30a8\u30ea\u3067\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u306f1\u3064\u306e\u30af\u30a8\u30ea\u3067\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u683c\u7d0d\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u6271\u3044\u305f\u3044\u5834\u5408\u306b\u4fbf\u5229\u3067\u3059\u3002<\/span>\u4e3b\u306b\u3001SELECT\u6587\u3068\u4f75\u7528\u3057\u3066\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u62bd\u51fa\u3059\u308b\u306e\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/join5.png\" class=\"post-img\">\n\n\n<p>\u3053\u3053\u304b\u3089\u306f\u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb\u3092\u7528\u3044\u3066\u305d\u308c\u305e\u308c\u306e\u7a2e\u985e\u3068\u9069\u3057\u305f\u7528\u9014\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2 id=\"outline__2\" class=\"wp-block-heading\">\u30b5\u30f3\u30d7\u30eb\u30c6\u30fc\u30d6\u30eb<\/h2>\n\n\n<p>\u300cJOIN\u300d\u53e5\u306e\u4f7f\u3044\u65b9\u306e\u8aac\u660e\u306b\u306f\u3001\u30b5\u30f3\u30d7\u30eb\u3068\u3057\u3066\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u3068\u300c\u904b\u52d5\u90e8\u300d\u30c6\u30fc\u30d6\u30eb\u3092\u7528\u3044\u307e\u3059\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>\u5b66\u7c4d\u756a\u53f7\uff08number\uff09<\/strong><\/td><td><strong>\u6c0f\u540d\uff08name\uff09<\/strong><\/td><td><strong>\u90e8\u6d3bID\uff08club_id\uff09<\/strong><\/td><\/tr><tr><td>1<\/td><td>\u83ca\u6c60<\/td><td>1<\/td><\/tr><tr><td>2<\/td><td>\u9234\u6728<\/td><td>3<\/td><\/tr><tr><td>3<\/td><td>\u7530\u4e2d<\/td><td>4<\/td><\/tr><tr><td>4<\/td><td>\u5c71\u7530<\/td><td>1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p><strong>\u300c\u904b\u52d5\u90e8\uff08sport_club\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>\u7af6\u6280\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>1<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>2<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>3<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"margin-top:4%;\">\r\n<a href=\"https:\/\/techmania.jp\/\"><p style=\"text-align:center; font-weight:bold; color:black; text-decoration:underline black;\">\u3042\u306a\u305f\u306e\u3054\u5e0c\u671b\u306b\u6cbf\u3063\u305f\u6848\u4ef6\u304c<span style=\"color: red;\">\u5fc5\u305a<\/span>\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><span style=\"color: black;\">\u30fb<\/span><span style=\"color: blue;\">\u597d\u5f85\u9047<\/span><span style=\"color: black;\">\u306e\u6848\u4ef6\u3092\u3054\u7d39\u4ecb<\/span><\/p><\/a>\r\n<\/div>\r\n\r\n<div style=\"text-align:center; margin-top:1%;\"><a href=\"https:\/\/techmania.jp\/\"><img decoding=\"async\" style=\"filter:drop-shadow(0px 0px 2px 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\/02\/stop.png\"><\/a>\r\n<\/div>\r\n\r\n<div style=\"margin-top:0%;\">\r\n<a href=\"https:\/\/techmania.jp\/\"><p style=\"text-align:center; font-weight:bold; color:black; text-decoration:underline black;\">\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>\r\n<\/div>\n\n\n\n<h2 id=\"outline__3\" class=\"wp-block-heading\">\u5185\u90e8\u7d50\u5408\uff08INNER JOIN\u53e5\uff09<\/h2>\n\n\n<p>\u300cINNER JOIN\u300d\u53e5\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u6307\u5b9a\u3057\u305f\u30ab\u30e9\u30e0\u3067\u5024\u304c\u4e00\u81f4\u3059\u308b\u5834\u5408\u306b\u306e\u307f\u3001\u305d\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u7d50\u5408\u3055\u305b\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u3053\u306e\u5171\u901a\u306e\u5024\u3092\u6301\u305f\u306a\u3044\u30ec\u30b3\u30fc\u30c9\u306f\u9664\u5916\u3055\u308c\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u3001\u5358\u306b\u300cJOIN\u300d\u3068\u8a18\u8ff0\u3057\u305f\u5834\u5408\u3082\u300cINNER JOIN\u300d\u53e5\u6271\u3044\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/join6.png\" class=\"post-img\">\n\n\n<p><strong>\u56f3\uff1a\u5185\u90e8\u7d50\u5408\uff08INNER JOIN\u53e5\uff09\u306e\u30a4\u30e1\u30fc\u30b8<\/strong><\/p>\n<div class=\"pointBox\">\n<p>\u7d50\u5408\u6761\u4ef6\u306f\u3001\u7b49\u5024\u7d50\u5408 \uff08=\uff09\u306e\u307b\u304b\u306b\u3001\u975e\u7b49\u5024\u7d50\u5408\uff08&gt;\u3001 &lt;\u3001 &lt;&gt;, !=\u3001&#8230;\uff09\u3082\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<\/div>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA INNER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u7d50\u5408\u6761\u4ef6;<\/code><\/pre><\/div>\n\n\n<p>\u30c6\u30fc\u30d6\u30ebA\u304b\u3089\u53d6\u5f97\u3059\u308b\u30ab\u30e9\u30e0\u3092\u6307\u5b9a\u3057\u3001\u7d50\u5408\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30c7\u30fc\u30bf\u304c\u30c6\u30fc\u30d6\u30ebB\u306b\u3042\u308b\u5834\u5408\u306f1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name,sport_club.sport FROM student INNER JOIN sport_club ON student.club_id = sport_club.id;<\/code><\/pre><\/div>\n\n\n<p>\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u300c\u90e8\u6d3b\u300d\u30ab\u30e9\u30e0\u3068\u300c\u904b\u52d5\u90e8\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u300cID\u300d\u30ab\u30e9\u30e0\u3092\u7d10\u3065\u3051\u3001\u7d50\u5408\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5834\u5408\u306b\u3001\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u300c\u6c0f\u540d\u300d\u30ab\u30e9\u30e0\u3068\u300c\u904b\u52d5\u90e8\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u300c\u7af6\u6280\u300d\u30ab\u30e9\u30e0\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\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<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><td><strong>\u7af6\u6280<\/strong><br><strong>\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u91ce\u7403<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>\u5171\u901a\u3059\u308b\u5024\u304c\u306a\u3044\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u7530\u4e2d\u3055\u3093\u3001\u300c\u904b\u52d5\u90e8\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u300c\u30b5\u30c3\u30ab\u30fc\u300d\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u203b\u4e0b\u8a18\u30b3\u30fc\u30c9\u3067\u3082\u540c\u3058\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name,sport_club.sport\n FROM student,club_member WHERE student.club_id = sport_club.id;<\/code><\/pre><\/div>\n\n\n\n<h4 id=\"outline__3_0_1\" class=\"wp-block-heading\">\u5185\u90e8\u7d50\u5408\uff08INNER JOIN\u53e5\uff09\u3092\u4f7f\u3046\u5834\u9762<\/h4>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-techmania wp-block-embed-techmania\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"h6Df4iZH1O\"><a href=\"https:\/\/techmania.jp\/blog\/sql-inner-join\/\">SQL\u306e\u300cINNER JOIN\u300d\u3092\u57fa\u790e\u304b\u3089\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;SQL\u306e\u300cINNER JOIN\u300d\u3092\u57fa\u790e\u304b\u3089\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac&#8221; &#8212; TechMania\" src=\"https:\/\/techmania.jp\/blog\/sql-inner-join\/embed\/#?secret=CqcMtIuHDs#?secret=h6Df4iZH1O\" data-secret=\"h6Df4iZH1O\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 id=\"outline__4\" class=\"wp-block-heading\">\u5de6\u5916\u90e8\u7d50\u5408\uff08LEFT OUTER JOIN\u53e5\uff09<\/h2>\n\n\n<p>\u300cOUTER JOIN\u300d\u53e5\u306f\u3001\u5024\u304c\u4e00\u81f4\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3067\u3082\u7d50\u5408\u3057\u307e\u3059\u3002<\/p>\n<p>\u57fa\u6e96\u306b\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306b\u3088\u3063\u3066\u6b21\u306e3\u7a2e\u985e\u306b\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li>FROM\u53e5\u3067\u6307\u5b9a\u3057\u305f\u30c6\u30fc\u30d6\u30eb\uff08\u5de6\u5074\uff09\u3092\u57fa\u6e96\u306b\u3059\u308b<strong>\u300c\u5de6\u5916\u90e8\u7d50\u5408\uff08LEFT OUTER JOIN\u53e5\uff09\u300d<\/strong><\/li>\n<li>JOIN\u53e5\u3067\u6307\u5b9a\u3057\u305f\u30c6\u30fc\u30d6\u30eb\uff08\u53f3\u5074\uff09\u3092\u57fa\u6e96\u306b\u3059\u308b<strong>\u300c\u53f3\u5916\u90e8\u7d50\u5408\uff08RIGHT OUTER JOIN\u53e5\uff09\u300d<\/strong><\/li>\n<li>\u4e21\u65b9\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u57fa\u6e96\u306b\u3059\u308b<strong>\u300c\u5b8c\u5168\u5916\u90e8\u7d50\u5408\uff08FULL OUTER JOIN\u53e5\uff09\u300d<\/strong>\u203b\u30af\u30a8\u30ea\u540d\u306f\u4f7f\u7528\u3059\u308bRDBMS\u306b\u4f9d\u5b58<\/li>\n<\/ul>\n<p>\u305d\u308c\u305e\u308c\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u300cLEFT OUTER JOIN\u300d\u53e5\u306f\u3001\u7d50\u5408\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u7d50\u5408\u6761\u4ef6\u306b\u95a2\u308f\u3089\u305a\u3001\u30c6\u30fc\u30d6\u30ebA\u306e\u30ec\u30b3\u30fc\u30c9\u306f\u3059\u3079\u3066\u7d50\u5408\u3059\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u5024\u304c\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3001\u30c6\u30fc\u30d6\u30ebB\u306e\u8a72\u5f53\u7b87\u6240\u306b\u306fNULL\u304c\u5165\u308a\u307e\u3059\u3002<\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/join7.png\" class=\"post-img\">\n\n\n<p><strong>\u56f3\uff1a\u5de6\u5916\u90e8\u7d50\u5408\uff08LEFT OUTER JOIN\u53e5\uff09\u306e\u30a4\u30e1\u30fc\u30b8<\/strong><\/p>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA LEFT OUTER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u7d50\u5408\u6761\u4ef6;<\/code><\/pre><\/div>\n\n\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name,sport_club.sport FROM student LEFT OUTER JOIN sport_club ON student.club_id = sport_club.id;<\/code><\/pre><\/div>\n\n\n<div class=\"pointBox\">\n<p><span style=\"color: #000000;\"><strong>\u30ab\u30e9\u30e0\u540d\u306e\u8a18\u8ff0\u65b9\u6cd5<\/strong><\/span><\/p>\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u30ab\u30e9\u30e0\u540d\u306f\u300c\u30c6\u30fc\u30d6\u30eb\u540d.\u30ab\u30e9\u30e0\u540d\u300d\u3068\u8a18\u8ff0\u3059\u308b\u3068\u53ef\u8aad\u6027\u304c\u4e0a\u304c\u308b\u306e\u3067\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/span><\/span><\/p>\n<\/div>\n<div class=\"pointBox\">\n<p><span style=\"color: #000000;\"><strong>\u30a8\u30a4\u30ea\u30a2\u30b9\u540d\u306e\u6307\u5b9a\u65b9\u6cd5<\/strong><\/span><\/p>\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u300c\u30ab\u30e9\u30e0\u540d AS \u30a8\u30a4\u30ea\u30a2\u30b9\u540d\u300d\u3068\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u5168\u4f53\u306e\u8a18\u8ff0\u91cf\u3092\u6e1b\u3089\u305b\u305f\u308a\u3001\u30c6\u30fc\u30d6\u30eb\u3092\u898b\u5206\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n<\/div>\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<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><td><strong>\u7af6\u6280<\/strong><br><strong>\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>NULL<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u91ce\u7403<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>INNER JOIN\u53e5\u3067\u306f\u9664\u5916\u3055\u308c\u305f\u7530\u4e2d\u3055\u3093\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001LEFT OUTER JOIN\u53e5\u306e\u5834\u5408\u300c\u751f\u5f92\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u3059\u3079\u3066\u51fa\u529b\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n<h2 id=\"outline__5\" class=\"wp-block-heading\">\u53f3\u5916\u90e8\u7d50\u5408\uff08RIGHT OUTER JOIN\u53e5\uff09<\/h2>\n\n\n<p>\u300cRIGHT OUTER JOIN\u300d\u53e5\u306f\u3001\u7d50\u5408\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u7d50\u5408\u6761\u4ef6\u306b\u95a2\u308f\u3089\u305a\u3001\u53f3\u5074\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u306f\u3059\u3079\u3066\u7d50\u5408\u3059\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u5024\u304c\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3001\u5de6\u5074\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u8a72\u5f53\u7b87\u6240\u306b\u306fNULL\u304c\u5165\u308a\u307e\u3059\u3002<\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/join8.png\" class=\"post-img\">\n\n\n<p><strong>\u56f3\uff1a\u53f3\u5916\u90e8\u7d50\u5408\uff08RIGHT OUTER JOIN\u53e5\uff09\u306e\u30a4\u30e1\u30fc\u30b8<\/strong><\/p>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA RIGHT OUTER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u7d50\u5408\u6761\u4ef6;<\/code><\/pre><\/div>\n\n\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name,sport_club.sport FROM student RIGHT OUTER JOIN sport_club ON student.club_id = sport_club.id;<\/code><\/pre><\/div>\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<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><td><strong>\u7af6\u6280<\/strong><br><strong>\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>NULL<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u91ce\u7403<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>INNER JOIN\u53e5\u3067\u306f\u9664\u5916\u3055\u308c\u305f\u30b5\u30c3\u30ab\u30fc\u90e8\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001RIGHT OUTER JOIN\u53e5\u306e\u5834\u5408\u300c\u904b\u52d5\u90e8\u300d\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u3059\u3079\u3066\u51fa\u529b\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n<h2 id=\"outline__6\" class=\"wp-block-heading\">\u5b8c\u5168\u5916\u90e8\u7d50\u5408\uff08FULL OUTER JOIN\u53e5\uff09<\/h2>\n\n\n<p>\u300cFULL OUTER JOIN\u300d\u53e5\u306f\u3001\u7d50\u5408\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u7d50\u5408\u6761\u4ef6\u306b\u95a2\u308f\u3089\u305a\u3001\u3069\u3061\u3089\u304b\u4e00\u65b9\u306b\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u30c7\u30fc\u30bf\u3082\u51fa\u529b\u3059\u308b\u30af\u30a8\u30ea\u3067\u3059\u3002\u5024\u304c\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u3001\u5de6\u5074\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u8a72\u5f53\u7b87\u6240\u306b\u306fNULL\u304c\u5165\u308a\u307e\u3059\u30022\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u7db2\u7f85\u7684\u306b\u7d50\u5408\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/join9.png\" class=\"post-img\">\n\n\n<p><strong>\u56f3\uff1a\u5b8c\u5168\u5916\u90e8\u7d50\u5408\uff08FULL OUTER JOIN\u53e5\uff09\u306e\u30a4\u30e1\u30fc\u30b8<\/strong><\/p>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA FULL OUTER JOIN \u30c6\u30fc\u30d6\u30ebB ON \u7d50\u5408\u6761\u4ef6;<\/code><\/pre><\/div>\n\n\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name,sport_club.sport FROM student FULL OUTER JOIN sport_club ON student.club_id = sport_club.id;<\/code><\/pre><\/div>\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<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><td><strong>\u7af6\u6280<\/strong><br><strong>\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>NULL<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>\u7530\u4e2d<\/td><td>NULL<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u91ce\u7403<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 id=\"outline__6_0_1\" class=\"wp-block-heading\">\u5916\u90e8\u7d50\u5408\uff08OUTER JOIN\u53e5\uff09\u3092\u4f7f\u3046\u5834\u9762<\/h4>\n\n\n<p><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u5916\u90e8\u7d50\u5408\uff08OUTER JOIN\u53e5\uff09\u306f\u4e00\u81f4\u3057\u306a\u3044\u30ec\u30b3\u30fc\u30c9\u3082\u53d6\u5f97\u3067\u304d\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u88dc\u5b8c\u3084\u6b20\u640d\u30c7\u30fc\u30bf\u306e\u7279\u5b9a\u3001\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u306e\u7d71\u5408\u306a\u3069\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<h2 id=\"outline__7\" class=\"wp-block-heading\">\u4ea4\u5dee\u7d50\u5408\uff08CROSS JOIN\u53e5\uff09<\/h2>\n\n\n<p>\u300cCROSS JOIN\u300d\u53e5\u306f\u30012\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u3059\u3079\u3066\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u7db2\u7f85\u7684\u306b\u751f\u6210\u3059\u308b\u30af\u30a8\u30ea\u3067\u3001\u4ea4\u5dee\u7d50\u5408\u306f\u76f4\u7a4d\u7d50\u5408\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002\u305f\u3060\u3001\u5b9f\u7528\u6027\u304c\u306a\u304f\u3001\u300cCROSS JOIN\u300d\u53e5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u6ec5\u591a\u306b\u3042\u308a\u307e\u305b\u3093\u3002<span style=\"color: #0000ff;\"><br \/><\/span><\/p>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA CROSS JOIN \u30c6\u30fc\u30d6\u30ebB;<\/code><\/pre><\/div>\n\n\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT * FROM student CROSS JOIN sport_club;<\/code><\/pre><\/div>\n\n\n<p>2\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u30ec\u30b3\u30fc\u30c9\u5206\u3059\u3079\u3066\u639b\u3051\u5408\u308f\u305b\u3066\u3044\u308b\u305f\u3081\u30014 * 3\u3067\u8a0812\u884c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u5b66\u7c4d\u756a\u53f7<\/strong><br><strong>\uff08number\uff09<\/strong><\/td><td><strong>\u6c0f\u540d<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><td><strong>\u90e8\u6d3bID<\/strong><br><strong>\uff08club_id\uff09<\/strong><\/td><td><strong>ID<\/strong><br><strong>\uff08id\uff09<\/strong><\/td><td><strong>\u7af6\u6280<\/strong><br><strong>\uff08sport\uff09<\/strong><\/td><\/tr><tr><td>1<\/td><td>\u83ca\u6c60<\/td><td>1<\/td><td>1<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>1<\/td><td>\u83ca\u6c60<\/td><td>1<\/td><td>2<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>1<\/td><td>\u83ca\u6c60<\/td><td>1<\/td><td>3<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>2<\/td><td>\u9234\u6728<\/td><td>3<\/td><td>1<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>2<\/td><td>\u9234\u6728<\/td><td>3<\/td><td>2<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>2<\/td><td>\u9234\u6728<\/td><td>3<\/td><td>3<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>3<\/td><td>\u7530\u4e2d<\/td><td>4<\/td><td>1<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>3<\/td><td>\u7530\u4e2d<\/td><td>4<\/td><td>2<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>3<\/td><td>\u7530\u4e2d<\/td><td>4<\/td><td>3<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>4<\/td><td>\u5c71\u7530<\/td><td>1<\/td><td>1<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>4<\/td><td>\u5c71\u7530<\/td><td>1<\/td><td>2<\/td><td>\u30b5\u30c3\u30ab\u30fc<\/td><\/tr><tr><td>4<\/td><td>\u5c71\u7530<\/td><td>1<\/td><td>3<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>\u203b\u4e0b\u8a18\u30b3\u30fc\u30c9\u3067\u3082\u540c\u3058\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT *\n FROM student,sport_club;<\/code><\/pre><\/div>\n\n\n\n<h2 id=\"outline__8\" class=\"wp-block-heading\">\uff13\u3064\u4ee5\u4e0a\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3059\u308b\u5834\u5408<\/h2>\n\n\n<p>3\u3064\u4ee5\u4e0a\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3055\u305b\u308b\u5834\u5408\u306f\u9806\u756a\u3068\u7d50\u5408\u6761\u4ef6\u306b\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<span style=\"color: #0000ff;\"><br \/><\/span><\/p>\n<p><strong>\u3010\u4f7f\u7528\u30a4\u30e1\u30fc\u30b8\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT \u30ab\u30e9\u30e0\u540d FROM \u30c6\u30fc\u30d6\u30ebA JOIN \u30c6\u30fc\u30d6\u30ebB ON \u7d50\u5408\u6761\u4ef61 JOIN \u30c6\u30fc\u30d6\u30ebC ON \u7d50\u5408\u6761\u4ef62;<\/code><\/pre><\/div>\n\n\n<p>\u9806\u756a\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3057\u307e\u3059\u3002<\/p>\n<p>\u300c\u4f53\u80b2\u9928\u5229\u7528\u300d\u30c6\u30fc\u30d6\u30eb\u3092\u7528\u3044\u3066\u3001\u4f53\u80b2\u9928\u3092\u5229\u7528\u3059\u308b\u904b\u52d5\u90e8\u306e\u751f\u5f92\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u300c\u4f53\u80b2\u9928\u5229\u7528\uff08gym_use\uff09\u300d\u30c6\u30fc\u30d6\u30eb<\/strong><\/p>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u90e8\u6d3bID\uff08club_id\uff09<\/strong><\/td><td><strong>\u5229\u7528\u6642\u9593\u5e2f\uff08time_zone\uff09<\/strong><\/td><\/tr><tr><td>3<\/td><td>\u5348\u524d<\/td><\/tr><tr><td>4<\/td><td>\u5348\u5f8c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p><strong>\u3010\u5b9f\u884c\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT student.name FROM student INNER JOIN sport_club ON student.club_id = sport_club.id INNER JOIN gym_use ON student.club_id = gym_use.club_id;<\/code><\/pre><\/div>\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<\/strong><br><strong>\uff08name\uff09<\/strong><\/td><\/tr><tr><td>\u9234\u6728<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f1\u3064\u76ee\u306eJOIN\u53e5\u3067\u904b\u52d5\u90e8\u306e\u751f\u5f92\u3092\u62bd\u51fa\u3057\u30012\u3064\u76ee\u306eJOIN\u53e5\u3067\u4f53\u80b2\u9928\u3092\u5229\u7528\u3059\u308b\u90e8\u6d3b\u306b\u5c5e\u3059\u308b\u751f\u5f92\u3092\u62bd\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<span style=\"color: #0000ff;\"><\/span><\/p>\n\n\n<h2 id=\"outline__9\" class=\"wp-block-heading\">JOIN\u53e5\u306e\u5fdc\u7528\u4f8b<\/h2>\n\n\n\n<p>\u3053\u3053\u307e\u3067\u306b\u7d39\u4ecb\u3057\u3066\u304d\u305fJOIN\u53e5\u306e\u4f7f\u7528\u4f8b\u306e\u4ed6\u306b\u3082\u3001\u3044\u304f\u3064\u304b\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 id=\"outline__9_1\" class=\"wp-block-heading\">\u30bb\u30eb\u30d5\u7d50\u5408<\/h3>\n\n\n\n<p>\u540c\u4e00\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u5225\u540d\u3067\u4e8c\u5ea6\u53c2\u7167\u3057\u3066\u3001\u968e\u5c64\u69cb\u9020\u3084\u30c7\u30fc\u30bf\u9593\u306e\u95a2\u9023\u6027\u306a\u3069\u3092\u62bd\u51fa\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u53d6\u5f97\u3067\u304d\u308b\u306e\u3067\u3001\u305f\u3068\u3048\u3070\u793e\u54e1\u60c5\u5831\u304b\u3089\u4e0a\u53f8\u30fb\u90e8\u4e0b\u3068\u3044\u3063\u305f\u95a2\u4fc2\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30b5\u30f3\u30d7\u30eb\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3063\u3066\u3001\u540c\u3058\u90e8\u6d3b\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u30af\u30a8\u30ea\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT s1.name AS \u672c\u4eba,\n       s2.name AS \u540c\u3058\u90e8\u6d3b\u306e\u4eba\nFROM   student s1\nJOIN   student s2\n  ON   s1.club_id = s2.club_id\nWHERE  s1.number != s2.number;\n<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u672c\u4eba<\/td><td>\u540c\u3058\u90e8\u6d3b\u306e\u4eba<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u83ca\u6c60<\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u5c71\u7530<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"outline__9_2\" class=\"wp-block-heading\">USING\u3067\u5171\u901a\u306e\u30ab\u30e9\u30e0\u3092\u7d50\u5408\u3059\u308b<\/h3>\n\n\n\n<p>\u5171\u901a\u306e\u30ab\u30e9\u30e0\u540d\u304c\u3042\u308b\u3068\u304d\u306b\u4f7f\u3048\u308bJOIN\u53e5\u306e\u7528\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u30af\u30a8\u30ea\u3011<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT s.name AS \u5b66\u751f\u540d, c.name AS \u90e8\u6d3b\u540d\nFROM   student s\nJOIN   club c USING (club_id);<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u5b66\u751f\u540d<\/td><td>\u90e8\u6d3b\u540d<\/td><\/tr><tr><td>\u83ca\u6c60<\/td><td>\u91ce\u7403<\/td><\/tr><tr><td>\u9234\u6728<\/td><td>\u30d0\u30b9\u30b1\u30c3\u30c8\u30dc\u30fc\u30eb<\/td><\/tr><tr><td>\u5c71\u7530<\/td><td>\u91ce\u7403<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3053\u306e\u8a18\u6cd5\u3092\u7528\u3044\u308b\u3068\u3001JOIN\u306e\u7d50\u5408\u6761\u4ef6\u306e\u90e8\u5206\u3092 &#8220;ON a.column = b.column&#8221; \u306e\u3088\u3046\u306b\u3057\u306a\u304f\u3068\u3082\u3001\u7701\u7565\u3057\u305f\u5f62\u3067\u30af\u30a8\u30ea\u3092\u7d44\u307f\u7acb\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5171\u901a\u3059\u308b\u30ab\u30e9\u30e0\u540d\u306f\u660e\u793a\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u53ef\u8aad\u6027\u306e\u70b9\u3067\u3082\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__10\" 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\u300cSQL\u300d\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\u300cNoSQL\u300d\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\u300cMySQL\u300d\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\u300cPostgreSQL\u300d\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\u300cSQL Server\u300d\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\u300cSQLite\u300d\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\u300cphpMyAdmin\u300d\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\u300cSELECT\u300d\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\u300cINSERT\u300d\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\u300cDELETE\u300d\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\u300cUPDATE\u300d\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\u300cWHERE\u300d\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\u300cHAVING\u300d\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\u300cIN\u300d\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\u300cDISTINCT\u300d<\/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\u300cBETWEEN\u300d\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\u300cEXISTS\u300d\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\u300cCOUNT\u300d\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\u300cGROUP BY\u300d\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\u300cORDER BY\u300d\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\u300cJOIN\u300d\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\u300cUNION\u300d\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\u300cLIKE\u300d\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\u300cCASE\u300d\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\">\u300cNULL\u300d\u306e\u6271\u3044\u65b9<\/a><\/span><\/li>\n<\/ul>\n<\/div>\n\n\n<h2 id=\"outline__11\" 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 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rel=\"noopener\">\u3053\u3061\u3089<\/a>\u304b\u3089\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002<\/p>","protected":false},"excerpt":{"rendered":"SQL\u3067\u306f\u300cJOIN\u300d\u53e5\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u30921\u3064\u306b\u7d50\u5408\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u64cd\u4f5c\u306f\u96c6\u8a08\u3084\u8907\u6570\u7b87\u6240\u306b\u5206\u6563\u3057\u305f\u30c7\u30fc\u30bf\u3092\u307e\u3068\u3081\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002JOIN\u53e5\u306b\u306f5\u7a2e\u985e\u3042\u308a\u3001\u53d6\u5f97\u3059\u308b\u30c7\u30fc\u30bf\u306e\u6027\u8cea\u3084\u7528\u9014\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u300cJOIN\u300d\u53e5\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3068\u3001\u305d\u306e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002 JOIN\u53e5\u3068\u306f SQL\u306e\u300cJOIN\u300d\u53e5\u306f\u3001\u95a2\u9023\u3059\u308b\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u95a2\u9023\u4ed8\u3051\u308b\u300c\u30c6\u30fc\u30d6\u30eb 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