{"id":28879,"date":"2023-05-23T07:31:54","date_gmt":"2023-05-22T22:31:54","guid":{"rendered":"https:\/\/gri.jp\/media\/?p=28879"},"modified":"2025-11-20T12:14:45","modified_gmt":"2025-11-20T03:14:45","slug":"ddl%e3%81%a8%e3%81%af%ef%bc%9f-%e3%83%87%e3%83%bc%e3%82%bf%e5%ae%9a%e7%be%a9%e8%a8%80%e8%aa%9e-data-definition-language","status":"publish","type":"post","link":"https:\/\/gri.jp\/media\/entry\/28879","title":{"rendered":"DDL\u3068\u306f\uff1f \u30c7\u30fc\u30bf\u5b9a\u7fa9\u8a00\u8a9e, Data Definition Language"},"content":{"rendered":"

DDL\u306b\u3064\u3044\u3066<\/h2>\n

DDL\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306e\u8a00\u8a9e\u3002\u30c6\u30fc\u30d6\u30eb\u3084\u30d3\u30e5\u30fc\u3092\u4f5c\u6210\u3059\u308b\u6587\u6cd5\u3092\u63d0\u4f9b\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5909\u66f4\u3092\u5bb9\u6613\u306b\u3059\u308b\u3002<\/p>\n

\u8981\u70b9 – DDL<\/h2>\n

DDL\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u304a\u3044\u3066\u30c7\u30fc\u30bf\u5b9a\u7fa9\u8a00\u8a9e\u3092\u6307\u3059\u7565\u8a9e\u3067\u3042\u308b\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30d3\u30e5\u30fc\u306a\u3069\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u6587\u6cd5\u3092\u63d0\u4f9b\u3059\u308b\u3002DDL\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u307e\u305f\u3001DDL\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5909\u66f4\u3092\u5bb9\u6613\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f8b\u3048\u3070\u3001\u65b0\u3057\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u3001CREATE TABLE\u6587\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u7c21\u5358\u306b\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002DDL\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u3084\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u3084\u4fdd\u5b88\u306b\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3067\u3042\u308b\u3002<\/p>\n

\u3082\u3046\u3059\u3053\u3057\u8a73\u3057\u304f – DDL<\/h2>\n

\u300cDDL\u300d\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u304a\u3051\u308b\u300c\u30c7\u30fc\u30bf\u5b9a\u7fa9\u8a00\u8a9e\u300d\uff08Data Definition Language\uff09\u3092\u8868\u3059\u82f1\u8a9e\u306e\u7565\u8a9e\u3067\u3059\u3002<\/p>\n

\u3053\u306e\u8a00\u8a9e\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\uff08\u30c6\u30fc\u30d6\u30eb\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30d3\u30e5\u30fc\u306a\u3069\uff09\u3092\u4f5c\u6210\u3001\u5909\u66f4\u3001\u524a\u9664\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u3053\u306eDDL\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u3084\u958b\u767a\u8005\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u3084\u4fdd\u5b88\u3092\u884c\u3046\u969b\u306b\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5177\u4f53\u7684\u306b\u306f\u3001DDL\u306f\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u547d\u4ee4\u3092\u63d0\u4f9b\u3057\u307e\u3059\uff1a\u300cCREATE\u300d\u3001\u300cALTER\u300d\u3001\u300cDROP\u300d\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u547d\u4ee4\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u81ea\u7531\u306b\u8a2d\u8a08\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u300cCREATE\u300d\u306f\u3001\u65b0\u3057\u3044\u30c6\u30fc\u30d6\u30eb\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30d3\u30e5\u30fc\u306a\u3069\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4f5c\u6210\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u547d\u4ee4\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u5834\u6240\u3092\u8a2d\u3051\u3001\u305d\u306e\u69cb\u9020\uff08\u5404\u5217\u306e\u540d\u524d\u3084\u30c7\u30fc\u30bf\u578b\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u300cALTER\u300d\u306f\u3001\u3059\u3067\u306b\u5b58\u5728\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306a\u3069\u306e\u69cb\u9020\u3092\u5909\u66f4\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u547d\u4ee4\u3092\u7528\u3044\u3066\u3001\u5217\u306e\u8ffd\u52a0\u3084\u524a\u9664\u3001\u30c7\u30fc\u30bf\u578b\u306e\u5909\u66f4\u3001\u30c6\u30fc\u30d6\u30eb\u540d\u306e\u5909\u66f4\u306a\u3069\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5f8c\u304b\u3089\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u300cDROP\u300d\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30c6\u30fc\u30d6\u30eb\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u30d3\u30e5\u30fc\u306a\u3069\u3092\u524a\u9664\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u547d\u4ee4\u306b\u3088\u308a\u3001\u4e0d\u8981\u306b\u306a\u3063\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u5b8c\u5168\u306b\u524a\u9664\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u3089\u306eDDL\u306e\u547d\u4ee4\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u52b9\u7387\u7684\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001DDL\u306f\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u5f79\u5272\u3082\u679c\u305f\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u578b\u306e\u5b9a\u7fa9\u3084\u5236\u7d04\u306e\u8a2d\u5b9a\u306a\u3069\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u683c\u7d0d\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u5f62\u5f0f\u3084\u5185\u5bb9\u3092\u5236\u5fa1\u3057\u3001\u30c7\u30fc\u30bf\u306e\u54c1\u8cea\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001DDL\u547d\u4ee4\u306f\u614e\u91cd\u306b\u6271\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3068\u304f\u306b\u3001\u300cDROP\u300d\u547d\u4ee4\u306f\u3001\u4e00\u5ea6\u5b9f\u884c\u3059\u308b\u3068\u524a\u9664\u3057\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5143\u306b\u623b\u3059\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u9593\u9055\u3063\u305f\u547d\u4ee4\u3092\u5b9f\u884c\u3059\u308b\u3068\u5927\u304d\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001DDL\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u3084\u904b\u7528\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u3001\u52b9\u7387\u7684\u3067\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u7ba1\u7406\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3055\u3089\u306b\u3001DDL\u306f\u3001\u8907\u6570\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff08DBMS\uff09\u9593\u3067\u306e\u30c7\u30fc\u30bf\u79fb\u884c\u3092\u652f\u63f4\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306fDDL\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u305f\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u3001\u4e00\u3064\u306eDBMS\u304b\u3089\u5225\u306eDBMS\u3078\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8ee2\u9001\u3059\u308b\u305f\u3081\u306e\u30d6\u30eb\u30fc\u30d7\u30ea\u30f3\u30c8\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n

\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u306a\u308bDBMS\u9593\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u4e00\u8cab\u3057\u3066\u518d\u73fe\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001DDL\u306e\u9069\u7528\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u7279\u306b\u300cDROP\u300d\u3084\u300cALTER\u300d\u306f\u7834\u58ca\u7684\u306a\u64cd\u4f5c\u3067\u3042\u308a\u3001\u5b9f\u884c\u5f8c\u306f\u5143\u306b\u623b\u3059\u3053\u3068\u304c\u96e3\u3057\u3044\u305f\u3081\u3001\u9069\u7528\u524d\u306b\u306f\u5341\u5206\u306a\u8a08\u753b\u3068\u78ba\u8a8d\u304c\u5fc5\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u5927\u898f\u6a21\u306a\u69cb\u9020\u5909\u66f4\u3092\u884c\u3046\u5834\u5408\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002 DDL\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u306e\u57fa\u790e\u3068\u306a\u308b\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u7ba1\u7406\u3068\u64cd\u4f5c\u306e\u305f\u3081\u306b\u306f\u3001\u305d\u306e\u7406\u89e3\u3068\u9069\u5207\u306a\u4f7f\u7528\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\u3084\u958b\u767a\u8005\u306f\u3001DDL\u306e\u57fa\u672c\u7684\u306a\u30b3\u30de\u30f3\u30c9\u3068\u305d\u306e\u4f7f\u7528\u6cd5\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u9069\u7528\u3059\u308b\u80fd\u529b\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n

\uff08\u4e86\uff09<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

DDL\u306b\u3064\u3044\u3066 DDL\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306e\u8a00\u8a9e\u3002\u30c6\u30fc\u30d6\u30eb\u3084\u30d3\u30e5\u30fc\u3092\u4f5c\u6210\u3059\u308b\u6587\u6cd5\u3092\u63d0\u4f9b\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5909\u66f4\u3092\u5bb9\u6613\u306b\u3059\u308b\u3002 \u8981\u70b9 #8211; DDL DDL\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b<\/p>\n","protected":false},"author":51,"featured_media":28880,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1058],"tags":[759],"class_list":["post-28879","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1058","tag-759"],"acf":[],"meta_field":{"_edit_lock":["1764889938:51"],"_edit_last":["51"],"_thumbnail_id":["28880"],"hidden_toppage":["0"],"_hidden_toppage":["field_61933136630d2"],"note_url":[""],"_note_url":["field_61243c8278b90"],"_pv_count":["a:24:{i:7;i:49;i:8;i:71;i:9;i:134;i:10;i:163;i:13;i:172;i:2;i:57;i:14;i:184;i:18;i:122;i:11;i:153;i:1;i:126;i:0;i:40;i:16;i:168;i:15;i:180;i:5;i:20;i:17;i:167;i:21;i:71;i:12;i:108;i:20;i:70;i:6;i:21;i:22;i:75;i:3;i:24;i:23;i:48;i:19;i:84;i:4;i:23;}"],"pv_count":["2330"]},"_links":{"self":[{"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/posts\/28879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/comments?post=28879"}],"version-history":[{"count":3,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/posts\/28879\/revisions"}],"predecessor-version":[{"id":37574,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/posts\/28879\/revisions\/37574"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/media\/28880"}],"wp:attachment":[{"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/media?parent=28879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/categories?post=28879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gri.jp\/media\/wp-json\/wp\/v2\/tags?post=28879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}