{"id":164083,"date":"2024-11-05T04:53:38","date_gmt":"2024-11-04T20:53:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164083\/"},"modified":"2024-11-05T04:53:39","modified_gmt":"2024-11-04T20:53:39","slug":"%e8%a7%a3%e6%9e%90sql-server-2008%e4%b8%ad%e7%9a%84%e6%96%b0%e8%aa%9e%e5%8f%a5%ef%bc%9amerge","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164083\/","title":{"rendered":"\u89e3\u6790SQL Server 2008\u4e2d\u7684\u65b0\u8a9e\u53e5\uff1aMERGE"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%9e%90sql-server-2008%e4%b8%ad%e7%9a%84%e6%96%b0%e8%aa%9e%e5%8f%a5%ef%bc%9amerge-bnykmXhXjR\">\u89e3\u6790SQL Server 2008\u4e2d\u7684\u65b0\u8a9e\u53e5\uff1aMERGE<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server 2008\u5f15\u5165\u4e86\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u8a9e\u53e5\u2014\u2014MERGE\u3002\u9019\u500b\u8a9e\u53e5\u7684\u51fa\u73fe\uff0c\u70ba\u8cc7\u6599\u7684\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u63d0\u4f9b\u4e86\u4e00\u7a2e\u66f4\u70ba\u9ad8\u6548\u548c\u7c21\u6f54\u7684\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMERGE\u8a9e\u53e5\u7684\u529f\u80fd\u3001\u8a9e\u6cd5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%8a%9f%e8%83%bd-bnykmXhXjR\">MERGE\u8a9e\u53e5\u7684\u529f\u80fd<\/h2>\n<p>MERGE\u8a9e\u53e5\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u76ee\u6a19\u8868\uff08target table\uff09\u8207\u6e90\u8868\uff08source table\uff09\u9032\u884c\u6bd4\u8f03\uff0c\u6839\u64da\u6bd4\u8f03\u7d50\u679c\u57f7\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u3002\u9019\u6a23\u7684\u64cd\u4f5c\u4e0d\u50c5\u80fd\u5920\u6e1b\u5c11\u591a\u6b21\u67e5\u8a62\u7684\u9700\u8981\uff0c\u9084\u80fd\u63d0\u9ad8\u57f7\u884c\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e8%aa%9e%e6%b3%95-bnykmXhXjR\">MERGE\u8a9e\u53e5\u7684\u8a9e\u6cd5<\/h2>\n<p>MERGE\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nMERGE INTO target_table AS target\nUSING source_table AS source\nON target.key_column = source.key_column\nWHEN MATCHED THEN\n    UPDATE SET target.column1 = source.column1, target.column2 = source.column2\nWHEN NOT MATCHED BY TARGET THEN\n    INSERT (column1, column2) VALUES (source.column1, source.column2)\nWHEN NOT MATCHED BY SOURCE THEN\n    DELETE;\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u8a9e\u6cd5\u4e2d\uff0c<\/p>\n<ul>\n<li><strong>target_table<\/strong>\uff1a\u76ee\u6a19\u8868\uff0c\u5373\u9700\u8981\u9032\u884c\u66f4\u65b0\u6216\u522a\u9664\u7684\u8868\u3002<\/li>\n<li><strong>source_table<\/strong>\uff1a\u6e90\u8868\uff0c\u5373\u7528\u4f86\u6bd4\u8f03\u7684\u8868\u3002<\/li>\n<li><strong>ON<\/strong>\uff1a\u6307\u5b9a\u6bd4\u8f03\u7684\u689d\u4ef6\u3002<\/li>\n<li><strong>WHEN MATCHED<\/strong>\uff1a\u7576\u76ee\u6a19\u8868\u548c\u6e90\u8868\u7684\u689d\u4ef6\u5339\u914d\u6642\u57f7\u884c\u7684\u64cd\u4f5c\u3002<\/li>\n<li><strong>WHEN NOT MATCHED BY TARGET<\/strong>\uff1a\u7576\u6e90\u8868\u4e2d\u7684\u884c\u5728\u76ee\u6a19\u8868\u4e2d\u4e0d\u5b58\u5728\u6642\u57f7\u884c\u7684\u64cd\u4f5c\u3002<\/li>\n<li><strong>WHEN NOT MATCHED BY SOURCE<\/strong>\uff1a\u7576\u76ee\u6a19\u8868\u4e2d\u7684\u884c\u5728\u6e90\u8868\u4e2d\u4e0d\u5b58\u5728\u6642\u57f7\u884c\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e7%a4%ba%e4%be%8b-bnykmXhXjR\">MERGE\u8a9e\u53e5\u7684\u5be6\u969b\u61c9\u7528\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>Employees<\/strong>\uff08\u54e1\u5de5\u8868\uff09\u548c<strong>NewEmployees<\/strong>\uff08\u65b0\u54e1\u5de5\u8868\uff09\u3002\u6211\u5011\u5e0c\u671b\u5c07\u65b0\u54e1\u5de5\u7684\u8cc7\u6599\u5408\u4f75\u5230\u54e1\u5de5\u8868\u4e2d\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u3002<\/p>\n<pre><code>\nMERGE INTO Employees AS target\nUSING NewEmployees AS source\nON target.EmployeeID = source.EmployeeID\nWHEN MATCHED THEN\n    UPDATE SET target.Name = source.Name, target.Position = source.Position\nWHEN NOT MATCHED BY TARGET THEN\n    INSERT (EmployeeID, Name, Position) VALUES (source.EmployeeID, source.Name, source.Position)\nWHEN NOT MATCHED BY SOURCE THEN\n    DELETE;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u54e1\u5de5\u8868\u4e2d\u7684EmployeeID\u8207\u65b0\u54e1\u5de5\u8868\u4e2d\u7684EmployeeID\u5339\u914d\u6642\uff0c\u5c07\u66f4\u65b0\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\uff1b\u5982\u679c\u65b0\u54e1\u5de5\u8868\u4e2d\u6709\u800c\u54e1\u5de5\u8868\u4e2d\u6c92\u6709\u7684EmployeeID\uff0c\u5247\u5c07\u5176\u63d2\u5165\u5230\u54e1\u5de5\u8868\u4e2d\uff1b\u5982\u679c\u54e1\u5de5\u8868\u4e2d\u6709\u800c\u65b0\u54e1\u5de5\u8868\u4e2d\u6c92\u6709\u7684EmployeeID\uff0c\u5247\u5c07\u5176\u522a\u9664\u3002<\/p>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%84%aa%e5%8b%a2-bnykmXhXjR\">MERGE\u8a9e\u53e5\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528MERGE\u8a9e\u53e5\u7684\u4e3b\u8981\u512a\u52e2\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7c21\u5316\u4ee3\u78bc\uff1a<\/strong>\u901a\u904e\u4e00\u500b\u8a9e\u53e5\u5b8c\u6210\u591a\u500b\u64cd\u4f5c\uff0c\u6e1b\u5c11\u4e86\u4ee3\u78bc\u7684\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u6e1b\u5c11\u4e86\u591a\u6b21\u67e5\u8a62\u7684\u9700\u8981\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u80fd\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li><strong>\u6613\u65bc\u7dad\u8b77\uff1a<\/strong>\u5408\u4f75\u64cd\u4f5c\u7684\u908f\u8f2f\u6e05\u6670\uff0c\u4fbf\u65bc\u5f8c\u7e8c\u7684\u7dad\u8b77\u548c\u4fee\u6539\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bnykmXhXjR\">\u7e3d\u7d50<\/h2>\n<p>SQL Server 2008\u4e2d\u7684MERGE\u8a9e\u53e5\u70ba\u8cc7\u6599\u5eab\u64cd\u4f5c\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u7c21\u5316\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\uff0cMERGE\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6027\u80fd\uff0c\u9084\u4f7f\u5f97\u4ee3\u78bc\u66f4\u52a0\u6613\u65bc\u7dad\u8b77\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u5834\u666f\uff0cMERGE\u8a9e\u53e5\u7121\u7591\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u9700\u6c42\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server 2008\u4e2d\u7684MERGE\u8a9e\u53e5\uff0c\u4e86\u89e3\u5176\u529f\u80fd\u3001\u7528\u6cd5\u53ca\u5982\u4f55\u7c21\u5316\u6578\u64da\u64cd\u4f5c\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-164083","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164083","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=164083"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164083\/revisions"}],"predecessor-version":[{"id":164084,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164083\/revisions\/164084"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}