{"id":1156,"date":"2012-06-14T13:50:52","date_gmt":"2012-06-14T04:50:52","guid":{"rendered":"http:\/\/www23.atpages.jp\/~inoni\/?p=1156"},"modified":"2017-03-29T16:27:29","modified_gmt":"2017-03-29T07:27:29","slug":"postgresql%e8%a6%9a%e6%9b%b8-%e9%85%8d%e5%88%97","status":"publish","type":"post","link":"http:\/\/anada.cloudfree.jp\/?p=1156","title":{"rendered":"PostgreSQL\u899a\u66f8 \u914d\u5217,\u7e26\u2192\u6a2a,\u30ab\u30f3\u30de\u533a\u5207\u308a"},"content":{"rendered":"<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u3063\u305f\u3068\u3057\u3066<br \/>\n\u3010t_sample\u3011<br \/>\nid,element,rank,&#8230;<br \/>\n1,&#8217;A&#8217;,1,&#8230;<br \/>\n1,&#8217;B&#8217;,2,&#8230;<br \/>\n1,&#8217;C&#8217;,3,&#8230;<br \/>\n2,&#8217;D&#8217;,1,&#8230;<\/p>\n<p>\u3053\u308c\u3092<br \/>\n1,&#8217;A,B,C&#8217;<br \/>\n2,&#8217;D&#8217;<br \/>\n\u3063\u3066\u306a\u611f\u3058\u3067\u53d6\u5f97\u3059\u308b\u65b9\u6cd5<\/p>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nSELECT id\r\n , ARRAY_TO_STRING(ARRAY(SELECT element\r\n                         FROM t_sample a\r\n                         WHERE a.id = b.id ORDER BY a.rank),',') elements\r\n FROM (SELECT id FROM t_sample GROUP BY id ORDER BY id) b\r\n<\/pre>\n<p><strong>ARRAY_TO_STRING<\/strong>\uff1a\u53d6\u5f97\u3057\u305f\u914d\u5217\u3092ARRAY_TO_STRING\u3067\u30ab\u30f3\u30de\u533a\u5207\u308a\u306b\u3059\u308b\u3002<\/p>\n<p>SQL\u6587\u304c\u5c11\u3005\u8907\u96d1\u3067\u9762\u5012\u3060\u3051\u3069\u3001\u4f7f\u3044\u52dd\u624b\u306f\u3088\u3055\u3052\u3002<\/p>\n<p>[\u7de8\u96c6\u30e1\u30e2] 2017\/3\/29 \u30bf\u30a4\u30c8\u30eb\u3068\u898b\u6804\u3048\u3092\u4fee\u6b63<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u3063\u305f\u3068\u3057\u3066 \u3010t_sample\u3011 id,element,rank,&#8230; 1,&#8217;A&#8217;,1,&#8230; 1,&#8217;B&#8217;,2,&#8230; 1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,3],"tags":[66,163],"class_list":["post-1156","post","type-post","status-publish","format-standard","hentry","category-sql","category-development","tag-postgresql","tag-163"],"_links":{"self":[{"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/posts\/1156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1156"}],"version-history":[{"count":3,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/posts\/1156\/revisions"}],"predecessor-version":[{"id":2496,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=\/wp\/v2\/posts\/1156\/revisions\/2496"}],"wp:attachment":[{"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1156"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/anada.cloudfree.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}