{"id":66183,"date":"2024-10-14T15:15:15","date_gmt":"2024-10-14T07:15:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66183\/"},"modified":"2024-10-14T15:15:15","modified_gmt":"2024-10-14T07:15:15","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-2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66183\/","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-RkAHzLBFBm\">MSSQL\u6578\u64da\u5eab\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u65b9\u6cd5\u7c21\u4ecb<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8d8a\u4f86\u8d8a\u666e\u904d\uff0c\u5c24\u5176\u662f\u5c0d\u65bc\u5927\u578b\u61c9\u7528\u7a0b\u5e8f\u548c\u4f01\u696d\u7cfb\u7d71\u800c\u8a00\u3002Microsoft SQL Server\uff08MSSQL\uff09\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u67e5\u8a62\u529f\u80fd\uff0c\u652f\u6301\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u7684\u67e5\u8a62\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u9019\u4e9b\u67e5\u8a62\u65b9\u6cd5\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e8%b7%a8%e8%a1%a8%e6%9f%a5%e8%a9%a2-RkAHzLBFBm\">\u8de8\u8868\u67e5\u8a62<\/h2>\n<p>\u8de8\u8868\u67e5\u8a62\u662f\u6307\u5728\u540c\u4e00\u6578\u64da\u5eab\u4e2d\uff0c\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u9019\u901a\u5e38\u901a\u904e\u4f7f\u7528 SQL \u7684 JOIN \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\u5305\u542b\u6240\u9700\u4fe1\u606f\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h3 id=\"join-%e7%9a%84%e9%a1%9e%e5%9e%8b-RkAHzLBFBm\">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-RkAHzLBFBm\">\u793a\u4f8b<\/h3>\n<pre><code>SELECT a.Name, b.OrderDate\nFROM Customers a\nINNER JOIN Orders b ON a.CustomerID = b.CustomerID;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e Customers \u8868\u548c Orders \u8868\u4e2d\u6aa2\u7d22\u5ba2\u6236\u540d\u7a31\u548c\u8a02\u55ae\u65e5\u671f\uff0c\u901a\u904e CustomerID \u9032\u884c\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-RkAHzLBFBm\">\u8de8\u6578\u64da\u5eab\u67e5\u8a62<\/h2>\n<p>\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u5247\u662f\u6307\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u67e5\u8a62\u3002\u9019\u5728\u9700\u8981\u5f9e\u591a\u500b\u6578\u64da\u5eab\u4e2d\u6574\u5408\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\u3002MSSQL \u5141\u8a31\u7528\u6236\u901a\u904e\u4e09\u90e8\u5206\u540d\u7a31\u4f86\u5f15\u7528\u5176\u4ed6\u6578\u64da\u5eab\u4e2d\u7684\u8868\uff0c\u683c\u5f0f\u70ba\uff1a<code>DatabaseName.SchemaName.TableName<\/code>\u3002<\/p>\n<h3 id=\"%e8%a8%ad%e7%bd%ae%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2-RkAHzLBFBm\">\u8a2d\u7f6e\u8de8\u6578\u64da\u5eab\u67e5\u8a62<\/h3>\n<p>\u5728\u9032\u884c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u4e4b\u524d\uff0c\u78ba\u4fdd\u7528\u6236\u64c1\u6709\u8a2a\u554f\u76ee\u6a19\u6578\u64da\u5eab\u7684\u6b0a\u9650\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.Name, b.OrderDate\nFROM Database1.dbo.Customers a\nINNER JOIN Database2.dbo.Orders b ON a.CustomerID = b.CustomerID;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e Database1 \u7684 Customers \u8868\u548c Database2 \u7684 Orders \u8868\u4e2d\u6aa2\u7d22\u6578\u64da\uff0c\u901a\u904e CustomerID \u9032\u884c\u5339\u914d\u3002<\/p>\n<h3 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-RkAHzLBFBm\">\u6ce8\u610f\u4e8b\u9805<\/h3>\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>\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u8f03\u5927\u7684\u60c5\u6cc1\u4e0b\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-RkAHzLBFBm\">\u7e3d\u7d50<\/h2>\n<p>\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u662f MSSQL \u4e2d\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u6574\u5408\u548c\u5206\u6790\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528 JOIN \u8a9e\u53e5\u548c\u4e09\u90e8\u5206\u540d\u7a31\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u5f9e\u4e0d\u540c\u7684\u6578\u64da\u6e90\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MSSQL\u6578\u64da\u5eab\u4e2d\u8de8\u8868\u548c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57fa\u672c\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u8207\u9748\u6d3b\u6027\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-66183","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66183","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=66183"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66183\/revisions"}],"predecessor-version":[{"id":66184,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66183\/revisions\/66184"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}