{"id":3631,"date":"2023-12-14T18:53:01","date_gmt":"2023-12-14T09:53:01","guid":{"rendered":"https:\/\/www.dogrow.net\/linux\/?p=3631"},"modified":"2023-12-29T01:28:19","modified_gmt":"2023-12-28T16:28:19","slug":"blog151","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/linux\/blog151\/","title":{"rendered":"(151)\u3010DB\u3011SQL\u6587\u4e2d\u306b\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u66f8\u304f\u3002"},"content":{"rendered":"<h1 class=\"my_h\">1. \u3084\u308a\u305f\u3044\u3053\u3068<\/h1>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u69cb\u6210\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u3063\u3066\u3044\u308b\u3068\u3059\u308b\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image16.jpg\" alt=\"\" class=\"my_add_bs1\" \/><\/p>\n<p>\u3053\u306e\u3068\u304d\u3001\u6307\u5b9a\u3057\u305f\u30af\u30e9\u30d6\u4e14\u3064\u3001\u6307\u5b9a\u3057\u305f\u5b66\u6821\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba\u306e\u540d\u524d\u3092\u691c\u7d22\u3057\u305f\u3044\u3002<\/p>\n<p>\u3059\u306a\u308f\u3061\u3001<br \/>\nmembership\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u6307\u5b9a\u3057\u305f\u30af\u30e9\u30d6(club)\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba(person)\u3092\u691c\u7d22\u3057\u3001<br \/>\naffiliation\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u6307\u5b9a\u3057\u305f\u5b66\u6821(school)\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba(person)\u3092\u691c\u7d22\u3057\u3001<br \/>\n\u305d\u306e\u4eba\u306e\u540d\u524d\u3092\u8868\u793a\u3057\u305f\u3044\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u4e09\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u60c5\u5831\u3092\u7d50\u5408\u3057\u3066\u30c7\u30fc\u30bf\u691c\u7d22\u3092\u884c\u3044\u305f\u3044\u3002<br \/>\n\u5404\u30c6\u30fc\u30d6\u30eb\u306e\u4ed5\u69d8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<p>\u30fbperson\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u4eba\u306e\u8b58\u5225\u756a\u53f7(pid)\u3068\u4eba\u306e\u540d\u524d(pname)\u3092\u6301\u3064\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image3.jpg\" alt=\"\"  \/><\/p>\n<p>\u30fbclub\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u30af\u30e9\u30d6\u306e\u8b58\u5225\u756a\u53f7(cid)\u3068\u30af\u30e9\u30d6\u540d(cname)\u3092\u6301\u3064\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image2.jpg\" alt=\"\"  \/><\/p>\n<p>\u30fbschool\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u5b66\u6821\u306e\u8b58\u5225\u756a\u53f7(sid)\u3068\u5b66\u6821\u540d(sname)\u3092\u6301\u3064\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image18.jpg\" alt=\"\"  \/><\/p>\n<p>\u30fbmembership\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u30af\u30e9\u30d6\u306e\u8b58\u5225\u756a\u53f7\u3068\u4eba\u306e\u8b58\u5225\u756a\u53f7\u3060\u3051\u3092\u6301\u3064\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image4.jpg\" alt=\"\" \/><\/p>\n<p>\u30fbaffiliation\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u5b66\u6821\u306e\u8b58\u5225\u756a\u53f7\u3068\u4eba\u306e\u8b58\u5225\u756a\u53f7\u3060\u3051\u3092\u6301\u3064\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image20.jpg\" alt=\"\" \/><\/p>\n<p>\u3088\u3063\u3066\u3001\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u6a2a\u65ad\u3057\u3066\u60c5\u5831\u53ce\u96c6\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br \/>\n\u3053\u308c\u3092 1\u56de\u306e\u30af\u30a8\u30ea\u767a\u884c\u3067\u5b9f\u73fe\u3057\u305f\u3044\u3002<\/p>\n<h1 class=\"my_h\">2. \u3084\u3063\u3066\u307f\u308b<\/h1>\n<h3 class=\"my_h\">(1) A\u4e2d\u5b66\u6821\u306e\u91ce\u7403\u90e8\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba\u3092\u691c\u7d22\u3059\u308b\u3002<\/h3>\n<p>pid=1, 6\u306e\u4e8c\u4eba\u304c\u3053\u306e\u6761\u4ef6\u306b\u30de\u30c3\u30c1\u3059\u308b\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image27.jpg\" alt=\"\"  \/><\/p>\n<p>\u4ee5\u4e0b\u306eSQL\u3092\u5b9f\u884c\u3059\u308b\u3002<\/p>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nSELECT SQ1.pid, SQ1.pname\r\nFROM (\r\n  SELECT person.pid, person.pname\r\n  FROM membership\r\n  JOIN person ON membership.cid='1' AND membership.pid=person.pid\r\n) AS SQ1\r\nJOIN (\r\n SELECT person.pid\r\n FROM affiliation\r\n JOIN person ON affiliation.sid='1' AND affiliation.pid=person.pid\r\n) AS SQ2\r\nON SQ1.pid = SQ2.pid;\r\n<\/pre>\n<p>OK\u3060\u3002\u610f\u56f3\u3057\u305f\u901a\u308a\u306e\u691c\u7d22\u7d50\u679c\u304c\u5f97\u3089\u308c\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/linux\/wp-content\/uploads\/2023\/12\/Image22.jpg\" alt=\"\"  \/><\/p>\n<p>\u4eca\u56de\u3082\u4e0a\u8a18\u306eSQL\u6587\u3092 ChatGPT\u306b\u89e3\u8aac\u3057\u3066\u3044\u305f\u3060\u3053\u3046\u3002<br \/>\n\u672c\u5f53\u306b\u4fbf\u5229\u306a\u5927\u8ce2\u8005\u69d8\u3060\u3002<\/p>\n<div style=\"background-color:#fffff8;padding:0.5rem\">\n\u3053\u306eSQL\u6587\u306f\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u7528\u3044\u3066\u3001\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u4eba\u7269\u306eID\u3068\u540d\u524d\u3092\u53d6\u5f97\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u7279\u5b9a\u306e\u30af\u30e9\u30d6\uff08cid=&#8217;1&#8217;\uff09\u304a\u3088\u3073\u7279\u5b9a\u306e\u5b66\u6821\uff08sid=&#8217;1&#8217;\uff09\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u3092\u691c\u7d22\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u90e8\u5206\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u5916\u5074\u306e\u30af\u30a8\u30ea\uff08\u30e1\u30a4\u30f3\u30af\u30a8\u30ea\uff09<\/h3>\n<p>\u30e1\u30a4\u30f3\u30af\u30a8\u30ea\u306f\u30012\u3064\u306e\u30b5\u30d6\u30af\u30a8\u30ea\uff08SQ1\u3068SQ2\uff09\u306e\u7d50\u679c\u3092JOIN\u3067\u7d50\u5408\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u7d50\u5408\u306e\u76ee\u7684\u306f\u3001\u4e21\u65b9\u306e\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u4eba\u7269\u306eID\uff08pid\uff09\u3068\u540d\u524d\uff08pname\uff09\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<h3>\u6700\u521d\u306e\u30b5\u30d6\u30af\u30a8\u30ea\uff08SQ1\uff09<\/h3>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nSELECT person.pid, person.pname\r\nFROM membership\r\nJOIN person ON membership.cid='1' AND membership.pid=person.pid\r\n<\/pre>\n<p>\u3053\u306e\u30b5\u30d6\u30af\u30a8\u30ea\u306f\u3001membership\u30c6\u30fc\u30d6\u30eb\u3068person\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3057\u3066\u3001\u7279\u5b9a\u306e\u30af\u30e9\u30d6\uff08cid=&#8217;1&#8217;\uff09\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u306eID\u3068\u540d\u524d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002JOIN\u306e\u6761\u4ef6\u306fmembership.pid=person.pid\uff08\u4eba\u7269ID\u306b\u57fa\u3065\u304f\u7d50\u5408\uff09\u3068membership.cid=&#8217;1&#8217;\uff08\u7279\u5b9a\u306e\u30af\u30e9\u30d6\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u3092\u9650\u5b9a\uff09\u3067\u3059\u3002<\/p>\n<h3>\u4e8c\u756a\u76ee\u306e\u30b5\u30d6\u30af\u30a8\u30ea\uff08SQ2\uff09<\/h3>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nSELECT person.pid\r\nFROM affiliation\r\nJOIN person ON affiliation.sid='1' AND affiliation.pid=person.pid\r\n<\/pre>\n<p>\u3053\u306e\u30b5\u30d6\u30af\u30a8\u30ea\u3067\u306f\u3001affiliation\u30c6\u30fc\u30d6\u30eb\u3068person\u30c6\u30fc\u30d6\u30eb\u3092\u7d50\u5408\u3057\u3066\u3001\u7279\u5b9a\u306e\u5b66\u6821\uff08sid=&#8217;1&#8217;\uff09\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u306eID\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3082JOIN\u306e\u6761\u4ef6\u306faffiliation.pid=person.pid\uff08\u4eba\u7269ID\u306b\u57fa\u3065\u304f\u7d50\u5408\uff09\u3068affiliation.sid=&#8217;1&#8217;\uff08\u7279\u5b9a\u306e\u5b66\u6821\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u3092\u9650\u5b9a\uff09\u3067\u3059\u3002<\/p>\n<h3>\u7d50\u5408\uff08JOIN\uff09<\/h3>\n<p>\u6700\u5f8c\u306b\u3001SQ1\u3068SQ2\u306e\u7d50\u679c\u3092JOIN\u3057\u3066\u3001\u4e21\u65b9\u306e\u6761\u4ef6\uff08\u7279\u5b9a\u306e\u30af\u30e9\u30d6\u3068\u7279\u5b9a\u306e\u5b66\u6821\u306b\u6240\u5c5e\u3059\u308b\uff09\u3092\u6e80\u305f\u3059\u4eba\u7269\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002ON SQ1.pid = SQ2.pid\u306f\u3001\u4e21\u65b9\u306e\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u7d50\u679c\u3067\u5171\u901a\u3059\u308bpid\u3092\u6301\u3064\u30ec\u30b3\u30fc\u30c9\u3092\u7d50\u5408\u3059\u308b\u6761\u4ef6\u3067\u3059\u3002<\/p>\n<h3>\u7d50\u679c<\/h3>\n<p>\u3053\u306e\u30af\u30a8\u30ea\u306e\u7d50\u679c\u3068\u3057\u3066\u5f97\u3089\u308c\u308b\u306e\u306f\u3001\u7279\u5b9a\u306e\u30af\u30e9\u30d6\uff08cid=&#8217;1&#8217;\uff09\u3068\u7279\u5b9a\u306e\u5b66\u6821\uff08sid=&#8217;1&#8217;\uff09\u306e\u4e21\u65b9\u306b\u6240\u5c5e\u3059\u308b\u4eba\u7269\u306eID\u3068\u540d\u524d\u3067\u3059\u3002\u3053\u308c\u306f\u30012\u3064\u306e\u7570\u306a\u308b\u7d44\u7e54\uff08\u30af\u30e9\u30d6\u3068\u5b66\u6821\uff09\u306b\u540c\u6642\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba\u7269\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\n<\/p><\/div>\n<hr class=\"my_hr_bottom\">\n","protected":false},"excerpt":{"rendered":"<p>1. \u3084\u308a\u305f\u3044\u3053\u3068 \u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u69cb\u6210\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u3063\u3066\u3044\u308b\u3068\u3059\u308b\u3002 \u3053\u306e\u3068\u304d\u3001\u6307\u5b9a\u3057\u305f\u30af\u30e9\u30d6\u4e14\u3064\u3001\u6307\u5b9a\u3057\u305f\u5b66\u6821\u306b\u6240\u5c5e\u3057\u3066\u3044\u308b\u4eba\u306e\u540d\u524d\u3092\u691c\u7d22\u3057\u305f\u3044\u3002 \u3059\u306a\u308f\u3061\u3001 membership\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u6307\u5b9a\u3057\u305f\u30af\u30e9\u30d6(cl\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.dogrow.net\/linux\/blog151\/\">\u7d9a\u304d\u3092\u8aad\u3080 &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[125,80],"tags":[],"class_list":["post-3631","post","type-post","status-publish","format-standard","hentry","category-db","category-mysql"],"views":834,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/posts\/3631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/comments?post=3631"}],"version-history":[{"count":7,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/posts\/3631\/revisions"}],"predecessor-version":[{"id":3649,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/posts\/3631\/revisions\/3649"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/media?parent=3631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/categories?post=3631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/linux\/wp-json\/wp\/v2\/tags?post=3631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}