{"id":76218,"date":"2024-10-16T04:50:15","date_gmt":"2024-10-15T20:50:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76218\/"},"modified":"2024-10-16T04:50:15","modified_gmt":"2024-10-15T20:50:15","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join%e5%9c%a8%e5%b7%a6%e8%a1%a8%e6%88%96%e5%8f%b3%e8%a1%a8%e4%b8%ad%e6%9c%89%e5%8c%b9%e9%85%8d%e6%99%82%e8%bf%94%e5%9b%9e%e6%89%80%e6%9c%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76218\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u4e2d\u6709\u5339\u914d\u6642\u8fd4\u56de\u6240\u6709\u8a18\u9304\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join%e5%9c%a8%e5%b7%a6%e8%a1%a8%e6%88%96%e5%8f%b3%e8%a1%a8%e4%b8%ad%e6%9c%89%e5%8c%b9%e9%85%8d%e6%99%82%e8%bf%94%e5%9b%9e%e6%89%80%e6%9c%89-LAMgvWFCUT\">MySQL\u5165\u9580\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u4e2d\u6709\u5339\u914d\u6642\u8fd4\u56de\u6240\u6709\u8a18\u9304<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cJOIN\u64cd\u4f5c\u662f\u7528\u4f86\u5f9e\u5169\u500b\u6216\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u7684\u95dc\u9375\u5de5\u5177\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u7a2eJOIN\u985e\u578b\uff0c\u5176\u4e2dFULL OUTER JOIN\u662f\u4e00\u500b\u76f8\u5c0d\u5c11\u898b\u4f46\u975e\u5e38\u6709\u7528\u7684\u9078\u64c7\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eFULL OUTER JOIN\u7684\u6982\u5ff5\u53ca\u5176\u5728MySQL\u4e2d\u7684\u61c9\u7528\uff0c\u7279\u5225\u662f\u5728\u5de6\u8868\u6216\u53f3\u8868\u4e2d\u6709\u5339\u914d\u6642\u8fd4\u56de\u6240\u6709\u8a18\u9304\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%affull-outer-join%ef%bc%9f-LAMgvWFCUT\">\u4ec0\u9ebc\u662fFULL OUTER JOIN\uff1f<\/h2>\n<p>FULL OUTER JOIN\u662f\u4e00\u7a2eJOIN\u64cd\u4f5c\uff0c\u5b83\u8fd4\u56de\u5de6\u8868\u548c\u53f3\u8868\u4e2d\u6240\u6709\u7684\u8a18\u9304\uff0c\u7121\u8ad6\u5b83\u5011\u662f\u5426\u6709\u5339\u914d\u7684\u884c\u3002\u9019\u610f\u5473\u8457\uff0c\u5982\u679c\u5de6\u8868\u4e2d\u7684\u67d0\u4e00\u884c\u5728\u53f3\u8868\u4e2d\u6c92\u6709\u5c0d\u61c9\u7684\u884c\uff0c\u8a72\u884c\u4ecd\u7136\u6703\u51fa\u73fe\u5728\u7d50\u679c\u96c6\u4e2d\uff0c\u4e26\u4e14\u53f3\u8868\u7684\u76f8\u61c9\u5217\u5c07\u986f\u793a\u70baNULL\u3002\u53cd\u4e4b\u4ea6\u7136\uff0c\u53f3\u8868\u4e2d\u7684\u884c\u5982\u679c\u5728\u5de6\u8868\u4e2d\u6c92\u6709\u5c0d\u61c9\u7684\u884c\uff0c\u4e5f\u6703\u51fa\u73fe\u5728\u7d50\u679c\u96c6\u4e2d\uff0c\u5de6\u8868\u7684\u76f8\u61c9\u5217\u5c07\u986f\u793a\u70baNULL\u3002<\/p>\n<h2 id=\"full-outer-join%e7%9a%84%e8%aa%9e%e6%b3%95-LAMgvWFCUT\">FULL OUTER JOIN\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cFULL OUTER JOIN\u4e26\u4e0d\u662f\u76f4\u63a5\u652f\u6301\u7684\uff0c\u4f46\u53ef\u4ee5\u901a\u904eUNION\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528UNION\u4f86\u6a21\u64ecFULL OUTER JOIN\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>\nSELECT A.*, B.*\nFROM \u8868A A\nLEFT JOIN \u8868B B ON A.\u5171\u540c\u5b57\u6bb5 = B.\u5171\u540c\u5b57\u6bb5\n\nUNION\n\nSELECT A.*, B.*\nFROM \u8868A A\nRIGHT JOIN \u8868B B ON A.\u5171\u540c\u5b57\u6bb5 = B.\u5171\u540c\u5b57\u6bb5;\n<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join-LAMgvWFCUT\">\u793a\u4f8b\uff1a\u4f7f\u7528FULL OUTER JOIN<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>\u5b78\u751f<\/strong>\u548c<strong>\u8ab2\u7a0b<\/strong>\u3002\u5b78\u751f\u8868\u5305\u542b\u5b78\u751f\u7684ID\u548c\u59d3\u540d\uff0c\u800c\u8ab2\u7a0b\u8868\u5305\u542b\u8ab2\u7a0b\u7684ID\u548c\u5b78\u751fID\u3002\u4ee5\u4e0b\u662f\u9019\u5169\u500b\u8868\u7684\u7d50\u69cb\uff1a<\/p>\n<ul>\n<li><strong>\u5b78\u751f<\/strong>\u8868\uff1a<\/li>\n<ul>\n<li>ID: 1, \u59d3\u540d: \u5f35\u4e09<\/li>\n<li>ID: 2, \u59d3\u540d: \u674e\u56db<\/li>\n<li>ID: 3, \u59d3\u540d: \u738b\u4e94<\/li>\n<\/ul>\n<li><strong>\u8ab2\u7a0b<\/strong>\u8868\uff1a<\/li>\n<ul>\n<li>ID: 1, \u5b78\u751fID: 1<\/li>\n<li>ID: 2, \u5b78\u751fID: 2<\/li>\n<li>ID: 3, \u5b78\u751fID: 4<\/li>\n<\/ul>\n<\/ul>\n<p>\u6211\u5011\u5e0c\u671b\u7372\u53d6\u6240\u6709\u5b78\u751f\u53ca\u5176\u6240\u9078\u8ab2\u7a0b\u7684\u4fe1\u606f\uff0c\u5373\u4f7f\u67d0\u4e9b\u5b78\u751f\u6c92\u6709\u9078\u64c7\u8ab2\u7a0b\uff0c\u6216\u8005\u67d0\u4e9b\u8ab2\u7a0b\u6c92\u6709\u5c0d\u61c9\u7684\u5b78\u751f\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>\nSELECT S.ID, S.\u59d3\u540d, C.\u5b78\u751fID\nFROM \u5b78\u751f S\nLEFT JOIN \u8ab2\u7a0b C ON S.ID = C.\u5b78\u751fID\n\nUNION\n\nSELECT S.ID, S.\u59d3\u540d, C.\u5b78\u751fID\nFROM \u5b78\u751f S\nRIGHT JOIN \u8ab2\u7a0b C ON S.ID = C.\u5b78\u751fID;\n<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u6240\u6709\u5b78\u751f\u53ca\u5176\u6240\u9078\u8ab2\u7a0b\u7684\u4fe1\u606f\uff0c\u672a\u9078\u64c7\u8ab2\u7a0b\u7684\u5b78\u751f\u5c07\u986f\u793aNULL\uff0c\u672a\u5c0d\u61c9\u5b78\u751f\u7684\u8ab2\u7a0b\u4e5f\u5c07\u986f\u793aNULL\u3002<\/p>\n<h2 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href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u63d0\u4f9b\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2MySQL\u4e2d\u7684FULL OUTER JOIN\uff0c\u4e86\u89e3\u5982\u4f55\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u6642\u8fd4\u56de\u6240\u6709\u8a18\u9304\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6280\u5de7\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-76218","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=76218"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76218\/revisions"}],"predecessor-version":[{"id":76219,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76218\/revisions\/76219"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}