{"id":66179,"date":"2024-10-14T15:13:13","date_gmt":"2024-10-14T07:13:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66179\/"},"modified":"2024-10-14T15:13:14","modified_gmt":"2024-10-14T07:13:14","slug":"mssql%e6%95%b8%e6%93%9a%e5%ba%ab%e8%b7%a8%e8%a1%a8%e5%92%8c%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e6%96%b9%e6%b3%95%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66179\/","title":{"rendered":"MSSQL\u6578\u64da\u5eab\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u65b9\u6cd5\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"mssql%e6%95%b8%e6%93%9a%e5%ba%ab%e8%b7%a8%e8%a1%a8%e5%92%8c%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e6%96%b9%e6%b3%95%e7%b0%a1%e4%bb%8b-WUarxqnldf\">MSSQL\u6578\u64da\u5eab\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u65b9\u6cd5\u7c21\u4ecb<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7279\u5225\u662f\u5728\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u6642\uff0c\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u7684\u9700\u6c42\u65e5\u76ca\u589e\u52a0\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u4ecb\u7d39MSSQL\u4e2d\u5982\u4f55\u9032\u884c\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u7684\u65b9\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u5229\u7528\u6578\u64da\u3002<\/p>\n<h2 id=\"%e8%b7%a8%e8%a1%a8%e6%9f%a5%e8%a9%a2-WUarxqnldf\">\u8de8\u8868\u67e5\u8a62<\/h2>\n<p>\u8de8\u8868\u67e5\u8a62\u662f\u6307\u5728\u540c\u4e00\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u591a\u500b\u8868\u7684\u6578\u64da\u3002\u9019\u901a\u5e38\u901a\u904e\u4f7f\u7528SQL\u7684JOIN\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002JOIN\u8a9e\u53e5\u53ef\u4ee5\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u5c07\u591a\u500b\u8868\u7684\u6578\u64da\u7d50\u5408\u5728\u4e00\u8d77\uff0c\u5f9e\u800c\u751f\u6210\u4e00\u500b\u7d9c\u5408\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h3 id=\"join%e7%9a%84%e9%a1%9e%e5%9e%8b-WUarxqnldf\">JOIN\u7684\u985e\u578b<\/h3>\n<ul>\n<li><strong>INNER JOIN<\/strong>: \u53ea\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>LEFT JOIN<\/strong>: \u8fd4\u56de\u5de6\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>RIGHT JOIN<\/strong>: \u8fd4\u56de\u53f3\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>FULL OUTER JOIN<\/strong>: \u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b-WUarxqnldf\">\u793a\u4f8b<\/h3>\n<pre><code>\nSELECT a.Column1, b.Column2\nFROM TableA a\nINNER JOIN TableB b ON a.ID = b.A_ID;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9eTableA\u548cTableB\u4e2d\u9078\u64c7\u4e86Column1\u548cColumn2\uff0c\u4e26\u901a\u904eID\u548cA_ID\u9032\u884c\u4e86\u5339\u914d\u3002<\/p>\n<h2 id=\"%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2-WUarxqnldf\">\u8de8\u6578\u64da\u5eab\u67e5\u8a62<\/h2>\n<p>\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u662f\u6307\u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u67e5\u8a62\u3002MSSQL\u5141\u8a31\u7528\u6236\u5728\u540c\u4e00\u5be6\u4f8b\u4e2d\u8a2a\u554f\u4e0d\u540c\u7684\u6578\u64da\u5eab\uff0c\u9019\u4f7f\u5f97\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u8b8a\u5f97\u76f8\u5c0d\u7c21\u55ae\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e4%b8%89%e9%83%a8%e5%88%86%e5%90%8d%e7%a8%b1-WUarxqnldf\">\u4f7f\u7528\u4e09\u90e8\u5206\u540d\u7a31<\/h3>\n<p>\u5728MSSQL\u4e2d\uff0c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u901a\u5e38\u4f7f\u7528\u4e09\u90e8\u5206\u540d\u7a31\u4f86\u6307\u5b9a\u6578\u64da\u5eab\u3001\u8868\u548c\u5217\u3002\u4e09\u90e8\u5206\u540d\u7a31\u7684\u683c\u5f0f\u70ba\uff1a<code>DatabaseName.SchemaName.TableName<\/code>\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-WUarxqnldf\">\u793a\u4f8b<\/h3>\n<pre><code>\nSELECT a.Column1, 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id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-WUarxqnldf\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u7528\u6236\u64c1\u6709\u8a2a\u554f\u6240\u6709\u76f8\u95dc\u6578\u64da\u5eab\u7684\u6b0a\u9650\u3002<\/li>\n<li>\u6ce8\u610f\u6027\u80fd\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WUarxqnldf\">\u7e3d\u7d50<\/h2>\n<p>\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u662fMSSQL\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9748\u6d3b\u5730\u7ba1\u7406\u548c\u5229\u7528\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528JOIN\u8a9e\u53e5\u548c\u4e09\u90e8\u5206\u540d\u7a31\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u591a\u500b\u8868\u548c\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MSSQL\u6578\u64da\u5eab\u4e2d\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u7684\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u6d41\u7a0b\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-66179","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66179","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=66179"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66179\/revisions"}],"predecessor-version":[{"id":66180,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66179\/revisions\/66180"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66179"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}