{"id":669,"date":"2019-08-28T13:20:45","date_gmt":"2019-08-28T04:20:45","guid":{"rendered":"http:\/\/e-sys.denshin.org\/blog\/?p=669"},"modified":"2019-10-01T20:03:26","modified_gmt":"2019-10-01T11:03:26","slug":"join%ef%bc%88%e5%86%85%e9%83%a8%e7%b5%90%e5%90%88%e3%83%bb%e5%a4%96%e9%83%a8%e7%b5%90%e5%90%88%ef%bc%89%e7%b7%b4%e7%bf%92","status":"publish","type":"post","link":"https:\/\/e-sys.ntsl.net\/?p=669","title":{"rendered":"JOIN\uff08\u5185\u90e8\u7d50\u5408\u30fb\u5916\u90e8\u7d50\u5408\uff09\u7df4\u7fd2"},"content":{"rendered":"<p>2\u3064\u306e\u30c6\u30fc\u30d6\u30eb<\/p>\n<p>x_fee_tbl<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-670\" src=\"http:\/\/e-sys.denshin.org\/blog\/wp-content\/uploads\/2019\/08\/2019-08-28_12h53_25.jpg\" alt=\"\" width=\"243\" height=\"81\" \/><\/p>\n<p>\u3068<\/p>\n<p>x_call<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-671\" src=\"http:\/\/e-sys.denshin.org\/blog\/wp-content\/uploads\/2019\/08\/2019-08-28_12h53_02.jpg\" alt=\"\" width=\"334\" height=\"103\" srcset=\"https:\/\/e-sys.ntsl.net\/wp-content\/uploads\/2019\/08\/2019-08-28_12h53_02.jpg 334w, https:\/\/e-sys.ntsl.net\/wp-content\/uploads\/2019\/08\/2019-08-28_12h53_02-300x93.jpg 300w\" sizes=\"auto, (max-width: 334px) 100vw, 334px\" \/><\/p>\n<p>\u3092\u5358\u7d14\u306b\u300c\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u300d(\u5916\u90e8\u7d50\u5408)\u3092\u3057\u307e\u3059\u3002<\/p>\n<p>SQL\u6587\u4f8b:<\/p>\n<p>SELECT * FROM x_fee_tbl JOIN x_call<\/p>\n<p>\u7d50\u679c<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-672\" src=\"http:\/\/e-sys.denshin.org\/blog\/wp-content\/uploads\/2019\/08\/2019-08-28_13h19_27.jpg\" alt=\"\" width=\"594\" height=\"155\" srcset=\"https:\/\/e-sys.ntsl.net\/wp-content\/uploads\/2019\/08\/2019-08-28_13h19_27.jpg 594w, https:\/\/e-sys.ntsl.net\/wp-content\/uploads\/2019\/08\/2019-08-28_13h19_27-300x78.jpg 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/p>\n<p>\u3053\u306e\u5834\u5408\u3067\u306f\u3001x_free_tbl( 2\u30ec\u30b3\u30fc\u30c9 ), x_call( 3\u30ec\u30b3\u30fc\u30c9 ) \u306e\u5916\u90e8\u7d50\u5408\u306b\u3088\u3063\u3066\u3001<\/p>\n<p>\u4e0a\u56f3\u306e\u3088\u3046\u306b\u30012\u00d73= 6 \u306e\u5217\u5408\u3055\u308c\u305f\u30ec\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u3066\u3001\u90e8\u5206\u7684\u306a\u60c5\u5831\u3060\u3051\u3092\u7d50\u5408\u3057\u305f\u7d50\u679c\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u304d\u307e\u3059\u3002<\/p>\n<p>\u5185\u90e8\u7d50\u5408( INNER JOIN )\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<p>x_fee_tbl\u30c6\u30fc\u30d6\u30eb\u306ecallsign \u3068\u3001x_call\u30c6\u30fc\u30d6\u30eb\u306ecallsign \u304c\u7b49\u3057\u3044\u3001\u3068\u3044\u3046\u6761\u4ef6\u3067\u3001<\/p>\n<p>x_fee_tbl\u306e3\u3064\u306e\u30ab\u30e9\u30e0\u306b\u3001x_call\u306ename \u3092\u542b\u3080\u7d50\u679c\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>SQL\u4f8b:<\/p>\n<p>SELECT x_fee_tbl.fee_code, x_fee_tbl.callsign, x_call.name FROM x_fee_tbl INNER JOIN x_call ON x_fee_tbl.callsign =x_call.my_callsign<\/p>\n<p>(\u30ab\u30e9\u30e0\u540d\u304c\u91cd\u8907\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3084\u3084\u77ed\u304f\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002)<\/p>\n<p>SELECT fee_code, x_fee_tbl.callsign, name FROM x_fee_tbl INNER JOIN x_call ON x_fee_tbl.callsign =x_call.my_callsign<\/p>\n<p>&nbsp;<\/p>\n<p>\u7d50\u679c:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-676\" src=\"http:\/\/e-sys.denshin.org\/blog\/wp-content\/uploads\/2019\/08\/2019-08-28_13h46_39.jpg\" alt=\"\" width=\"212\" height=\"46\" \/><\/p>\n<p>\u6761\u4ef6\u306b\u5408\u81f4\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3060\u3051\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>x_fee_tbl\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u3001\u30b3\u30fc\u30eb\u30b5\u30a4\u30f3\u306f\u3042\u308a\u307e\u3059\u304c\u3001name \u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>x_fee_tbl\u304c\u4fdd\u6301\u3057\u3066\u3044\u308bcallsign \u3067\u3001x_call \u30c6\u30fc\u30d6\u30eb\u306e\u540d\u524d\u3092\u53c2\u7167\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>2\u3064\u306e\u30c6\u30fc\u30d6\u30eb x_fee_tbl \u3068 x_call \u3092\u5358\u7d14\u306b\u300c\u30c6\u30fc\u30d6\u30eb\u7d50\u5408\u300d( &hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,11,5],"tags":[],"class_list":["post-669","post","type-post","status-publish","format-standard","hentry","category-mysql","category-rdbms","category-sql"],"_links":{"self":[{"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/posts\/669","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=669"}],"version-history":[{"count":4,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/posts\/669\/revisions"}],"predecessor-version":[{"id":677,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=\/wp\/v2\/posts\/669\/revisions\/677"}],"wp:attachment":[{"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=669"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=669"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/e-sys.ntsl.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=669"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}