{"id":6859,"date":"2018-02-22T07:25:11","date_gmt":"2018-02-21T22:25:11","guid":{"rendered":"https:\/\/tetraup.com\/news_topics\/archives\/6859"},"modified":"2024-09-05T16:05:15","modified_gmt":"2024-09-05T07:05:15","slug":"sql-essentials-part6","status":"publish","type":"post","link":"https:\/\/tetraup.com\/news_topics\/column\/sql-essentials-part6\/","title":{"rendered":"\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL Part6 \u301c\u4f3c\u3066\u975e\u306a\u308bTRUNCATE\u3068DROP\u301c"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"980\" height=\"700\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/02\/SQL6.png\" alt=\"\" class=\"wp-image-9297\"\/><\/figure>\n\n\n<h2>\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL Part6 \u301c\u4f3c\u3066\u975e\u306a\u308bTRUNCATE\u3068DROP\u301c<\/h2>\n<p><a href=\"https:\/\/knocknote.jp\/topics\/2018\/03\/03t\/\">\u524d\u56de<\/a>\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3068\u524a\u9664\u3092\u884c\u3046\u305f\u3081\u306e\u300cUPDATE\u300d\u3068\u300cDELETE\u300d\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u305f\u3002<br \/>\n\u4eca\u56de\u3001\u5b66\u3093\u3067\u3044\u304f\u306e\u306f\u524a\u9664\u3092\u884c\u3046\u305f\u3081\u306e\u300cTRUNCATE\u300d\u3068\u300cDROP\u300d\u3067\u3059\u3002<\/p>\n<p>Part1\u304b\u3089\u306e\u5185\u5bb9\u304c\u6c17\u306b\u306a\u308b\u65b9\u306f<a href=\"https:\/\/knocknote.jp\/topics\/2018\/02\/06s\/\">\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL Part1<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-994\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/02\/e2df62e75627f077364c764c19fba070_s.jpg\" alt=\"\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL\" width=\"640\" \/><\/p>\n<h2>\u524d\u56de\u306e\u304a\u3055\u3089\u3044<\/h2>\n<p>\u307e\u305a\u306f\u524d\u56de\u5b66\u3093\u3060\u300cUPDATE\u300d\u3068\u300cDELETE\u300d\u306b\u3064\u3044\u3066\u306e\u8efd\u3044\u304a\u3055\u3089\u3044\u3092\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>UPDATE<br \/>\n[sql]UPDATE t_employee SET name=&#8217;\u9b8e\u5ddd&#8217;AND age=&#8217;20&#8217; WHERE no=5;[\/sql]<\/p>\n<p>DELETE<br \/>\n[sql]DELETE FROM t_employee WHERE no=5;[\/sql]<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u66f8\u304f\u306e\u304c\u300cUPDATE\u300d\u3068\u300cDELETE\u300d\u3067\u3059\u3002\u3053\u3061\u3089\u304b\u3089\u524d\u56de\u306e\u5fa9\u7fd2\u304c\u3067\u304d\u307e\u3059\u2192<a href=\"https:\/\/knocknote.jp\/topics\/2018\/03\/03t\/\">\u524d\u56de\u306e\u8a18\u4e8b<\/a><\/p>\n<h2>\u4eca\u56de\u306e\u5185\u5bb9<\/h2>\n<p>\u4eca\u56de\u5b66\u3076\u306e\u306f\u300cTRUNCATE\u300d\u3068\u300cDROP\u300d\u3068\u3044\u3046\u524a\u9664\u306b\u95a2\u3059\u308b\u69cb\u6587\u3067\u3059\u3002<br \/>\n\u300c\u3048\u3063\uff1f\u524a\u9664\u306fDELETE\u3092\u4f7f\u3046\u3093\u3058\u3083\u306a\u3044\u306e\uff1f\u4f55\u304c\u9055\u3046\u306e\uff1f\u300d\u3068\u601d\u308f\u308c\u308b\u65b9\u3082\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<br \/>\n\u524a\u9664\u3092\u3059\u308b\u3068\u3044\u3046\u70b9\u3067\u306f\u4e09\u3064\u3068\u3082\u540c\u3058\u3067\u3059\u304c\u5b9f\u306f\u307e\u3063\u305f\u304f\u9055\u3046\u3082\u306e\u306a\u3093\u3067\u3059\u3002<\/p>\n<p>\u3057\u3063\u304b\u308a\u628a\u63e1\u305b\u305a\u306b\u4f7f\u3063\u3066\u9867\u5ba2\u306e\u30c7\u30fc\u30bf\u3092\u5168\u3066\u6d88\u3057\u3066\u3057\u307e\u3063\u305f\u2026\u306a\u3093\u3066\u3053\u3068\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u3053\u3053\u3067\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-1127\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/03\/570aea86d24cd4873f98fb0aee5e898a_s.jpg\" alt=\"\" width=\"640\" \/><\/p>\n<h2>\u300cTRUNCATE\u300d\u3063\u3066\uff1f<\/h2>\n<p>TRUNCATE\u3092\u4f7f\u3046\u3068\u30c6\u30fc\u30d6\u30eb\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u4e0b\u306e\u3088\u3046\u306b\u3057\u3066\u4f7f\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>[sql]TRUNCATE TABLE (\u30c6\u30fc\u30d6\u30eb\u540d);[\/sql]<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u3067\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u3067\u6d88\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u306f\u6d88\u3055\u305a\u306b\u6b8b\u3057\u3066\u304a\u3044\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>DELETE\u6587\u3067\u3082\u30c6\u30fc\u30d6\u30eb\u3092\u4e00\u62ec\u3067\u6d88\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001TRUNCATE\u306e\u65b9\u304c\u9ad8\u901f\u3067\u51e6\u7406\u3092\u884c\u3063\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\n\u30c6\u30fc\u30d6\u30eb\u306e\u5168\u90e8\u306e\u884c\u3092\u4e00\u62ec\u3067\u6d88\u3059\u3082\u306e\u306e\u3001WHERE\u53e5\u3067\u306e\u6307\u5b9a\u306f\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u3068\u3053\u308d\u3082DELETE\u3068\u306e\u9055\u3044\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u203bDBMS\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001MySQL\u3067\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\uff08\u5fa9\u5143\uff09\u304c\u51fa\u6765\u307e\u305b\u3093\u3002<\/p>\n<p>\u5b9f\u969b\u306b\u8a66\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u304c\u3082\u3068\u306e\u300ct_employee\u300d\u30c6\u30fc\u30d6\u30eb\u3067\u3059<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-1125\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/03\/columns2.png\" alt=\"\" width=\"231\" \/><\/p>\n<p>\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u8fbc\u3080\u3068<br \/>\n[sql]TRUNCATE TABLE t_employee;[\/sql]<\/p>\n<p>\u69cb\u9020\u3060\u3051\u6b8b\u3057\u3066\u5168\u90e8\u306e\u30c7\u30fc\u30bf\u304c\u6d88\u3048\u307e\u3059\u3002<br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-1124\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/03\/columns1.png\" alt=\"\" width=\"173\" \/><br \/>\n\u30c7\u30fc\u30bf\u304c\u7a7a\u3063\u307d\u3067\u3059\u3001\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><b>\u3057\u305f\u304c\u3063\u3066\u3001<br \/>\n\u30fb\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u3067\u65e9\u304f\u6d88\u3057\u305f\u3044<br \/>\n\u30fb\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u306f\u6d88\u3055\u305a\u306b\u6b8b\u3057\u3066\u304a\u304d\u305f\u3044<br \/>\n\u3068\u3044\u3046\u6642\u306b\u4f7f\u3048\u307e\u3059\u3002<\/b><\/p>\n<h2>DROP\u3063\u3066\uff1f<\/h2>\n<p>DROP\u306f\u540c\u3058\u304f\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u3067\u6d88\u3057\u3066\u304f\u308c\u308b\u6587\u3067\u3059\u3002<br \/>\n\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002<br \/>\n[sql]DROP TABLE (\u30c6\u30fc\u30d6\u30eb\u540d);[\/sql]<\/p>\n<p>TRUNCATE\u3068\u540c\u3058\u304f\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u6319\u306b\u6d88\u3057\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\nTRUNCATE\u3068\u9055\u3046\u3068\u3053\u308d\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u81ea\u4f53\u3082\u6b8b\u3057\u3066\u304f\u308c\u306a\u3044\u3068\u3044\u3046\u3068\u3053\u308d\u3067\u3059\u3002<br \/>\n\u203b\u3053\u308c\u3082DBMS\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001MySQL\u3067\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\uff08\u5fa9\u5143\uff09\u304c\u51fa\u6765\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u308c\u3082\u8a66\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u3082\u3046\u4e00\u5ea6\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7528\u3044\u307e\u3059\u3002<br \/>\n<img decoding=\"async\" class=\"aligncenter size-full wp-image-1125\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/03\/columns2.png\" alt=\"\" width=\"231\" \/><\/p>\n<p>\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u3068<br \/>\n[sql]DROP TABLE t_employee;[\/sql]<\/p>\n<p>\u69cb\u9020\u3054\u3068\u30c7\u30fc\u30bf\u304c\u6d88\u3048\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1126\" src=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/03\/columns3.png\" alt=\"\" width=\"336\" height=\"21\" \/><br \/>\n\u300ct_employee\u300d\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u305d\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u305b\u3093\u3068\u3044\u3046\u98a8\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><b>\u3057\u305f\u304c\u3063\u3066\u3001<br \/>\n\u30fb\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u3054\u3068\u4e00\u62ec\u3067\u6d88\u3057\u305f\u3044<br \/>\n\u3068\u3044\u3046\u6642\u306b\u4f7f\u3048\u307e\u3059\u3002<\/b><\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\uff1f<br \/>\n<b>\u30fbTRUNCATE\u3068DROP\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u6319\u306b\u6d88\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br \/>\n\u30fb\u9055\u3044\u306f\u69cb\u9020\u3092\u6b8b\u3057\u3066\u304f\u308c\u308b\u304b\u3069\u3046\u304b<br \/>\n\u30fb\u3069\u3061\u3089\u3082MySQL\u3067\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u3067\u304d\u306a\u3044<\/b><br \/>\n\u3068\u3044\u3046\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u6b21\u56de\u306f\u30c6\u30fc\u30d6\u30eb\u3068\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3055\u305b\u308b\u300cJOIN\u300d\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL Part6 \u301c\u4f3c\u3066\u975e\u306a\u308bTRUNCATE\u3068DROP\u301c \u524d\u56de\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3068\u524a\u9664\u3092\u884c\u3046\u305f\u3081\u306e\u300cUPDATE\u300d\u3068\u300cDELETE\u300d\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u305f\u3002 \u4eca\u56de\u3001\u5b66\u3093\u3067\u3044\u304f\u306e\u306f\u524a\u9664 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":9298,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-6859","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-column"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Michio Suzuki\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/tetraup.com\/news_topics\/column\/sql-essentials-part6\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"ja_JP\" \/>\n\t\t<meta property=\"og:site_name\" content=\"\u30cb\u30e5\u30fc\u30b9&amp;\u30c8\u30d4\u30c3\u30af\u30b9 | KnocknoteEducation\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u77e5\u3089\u306a\u3044\u3068\u30e4\u30d0\u30a4SQL Part6 \u301c\u4f3c\u3066\u975e\u306a\u308bTRUNCATE\u3068DROP\u301c | TETRA UP \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u6559\u5ba4\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/tetraup.com\/news_topics\/column\/sql-essentials-part6\/\" \/>\n\t\t<meta property=\"fb:admins\" content=\"1225479620796563\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/02\/SQL6-1.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/tetraup.com\/news_topics\/wp-content\/uploads\/2018\/02\/SQL6-1.png\" \/>\n\t\t<meta property=\"og:image:width\" content=\"980\" \/>\n\t\t<meta 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