{"id":338,"date":"2015-03-24T13:56:29","date_gmt":"2015-03-24T04:56:29","guid":{"rendered":"http:\/\/kei0310.info\/?p=338"},"modified":"2015-03-24T13:56:29","modified_gmt":"2015-03-24T04:56:29","slug":"post-338","status":"publish","type":"post","link":"http:\/\/kei0310.info\/?p=338","title":{"rendered":"[SQL][\u96c6\u8a08\u95a2\u6570] \u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308bcount\u95a2\u6570\u306e\u89e3\u8aac"},"content":{"rendered":"<p>count\u95a2\u6570\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p>count\u95a2\u6570\u306f\u3001\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u305f\u5358\u4f4d\u3067\u306e\u4ef6\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u3059\u3002<\/p>\n<p>\u7d30\u304b\u3044\u8a71\u306f\u66f8\u304b\u305a\u306b\u3001\u4f8b\u3067\u793a\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u8868\uff1a\u304f\u3060\u3082\u306e\u30ea\u30b9\u30c8\uff08\u9069\u5f53\uff09<\/p>\n<h6>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\nid | code | word\r\n-----------------\r\n01 | 0001 | \u308a\u3093\u3054\r\n02 | 0001 | \u308a\u3093\u3054\r\n03 | 0002 | \u307f\u304b\u3093\r\n<\/pre>\n<\/h6>\n<p>\u4f8b\uff11\uff1a\u5358\u7d14\u306b\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308bSQL\u3002<\/p>\n<h6>\n[SQL]<br \/>\nselect count(*) from tbl1;<br \/>\n[\/SQL]<br \/>\n<\/h6>\n<p>\u7d50\u679c<\/p>\n<h6>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\ncount\r\n-----------------\r\n3\r\n<\/pre>\n<\/h6>\n<p>\u4f8b\uff12\uff1acode\u6bce\u306e\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308bSQL\u3002<br \/>\n\u300cgroup by\u300d\u53e5\u3067code\u6bce\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<br \/>\ncount\u95a2\u6570\u306f\u3001\u307e\u3068\u3081\u305f\u5358\u4f4d\u6bce\u306b\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<h6>\n[SQL]<br \/>\nselect code, count(*) from tbl1 group by code;<br \/>\n[\/SQL]<br \/>\n<\/h6>\n<p>\u7d50\u679c<\/p>\n<h6>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\ncode | count\r\n-----------------\r\n0001 | 2\r\n0002 | 1\r\n<\/pre>\n<\/h6>\n<p>\u4f8b\uff13\uff1acode\u306e\u7a2e\u985e\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308bSQL\u3002<br \/>\n\u300cdistinct\u300d\u53e5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u91cd\u8907\u3092\u9664\u3044\u305f\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u3066\u308c\u307e\u3059\u3002<br \/>\ncode\u306bdistinct\u53e5\u3092\u4f7f\u7528\u3057\u3066\u3001\u7a2e\u985e\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u3066\u307e\u3059\u3002<\/p>\n<h6>\n[SQL]<br \/>\nselect count(distinct code) from tbl1;<br \/>\n[\/SQL]<br \/>\n<\/h6>\n<p>\u7d50\u679c<\/p>\n<h6>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\ncount\r\n-----------------\r\n2\r\n<\/pre>\n<\/h6>\n","protected":false},"excerpt":{"rendered":"<p>count\u95a2\u6570\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 count\u95a2\u6570\u306f\u3001\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u305f\u5358\u4f4d\u3067\u306e\u4ef6\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u3059\u3002 \u7d30\u304b\u3044\u8a71\u306f\u66f8\u304b\u305a\u306b\u3001\u4f8b\u3067\u793a\u3057\u3066\u3044\u304d\u307e\u3059\u3002 \u30b5\u30f3\u30d7\u30eb\u8868\uff1a\u304f\u3060\u3082\u306e\u30ea\u30b9\u30c8\uff08\u9069\u5f53\uff09 \u4f8b\uff11\uff1a\u5358\u7d14\u306b\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308bSQL\u3002 [ [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[37,10],"tags":[],"_links":{"self":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/338"}],"collection":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=338"}],"version-history":[{"count":1,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/338\/revisions"}],"predecessor-version":[{"id":339,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/338\/revisions\/339"}],"wp:attachment":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=338"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}