{"id":194781,"date":"2024-11-13T09:31:21","date_gmt":"2024-11-13T01:31:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/194781\/"},"modified":"2024-11-13T09:31:22","modified_gmt":"2024-11-13T01:31:22","slug":"%e5%87%bd%e6%95%b8%e4%bd%bf%e7%94%a8sql-server%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b8%e6%8f%90%e9%ab%98%e7%b5%b1%e8%a8%88%e6%95%88%e7%8e%87%ef%bc%88sqlserver%e7%9a%84%e7%aa%97%e5%8f%a3%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/194781\/","title":{"rendered":"\u51fd\u6578\u4f7f\u7528SQL Server\u7a97\u53e3\u51fd\u6578\u63d0\u9ad8\u7d71\u8a08\u6548\u7387\uff08sqlserver\u7684\u7a97\u53e3\uff09"},"content":{"rendered":"<h1 id=\"%e5%87%bd%e6%95%b8%e4%bd%bf%e7%94%a8sql-server%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b8%e6%8f%90%e9%ab%98%e7%b5%b1%e8%a8%88%e6%95%88%e7%8e%87%ef%bc%88sqlserver%e7%9a%84%e7%aa%97%e5%8f%a3%ef%bc%89-xHfyRYasps\">\u51fd\u6578\u4f7f\u7528SQL Server\u7a97\u53e3\u51fd\u6578\u63d0\u9ad8\u7d71\u8a08\u6548\u7387\uff08sqlserver\u7684\u7a97\u53e3\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u7a97\u53e3\u51fd\u6578\u662fSQL Server\u7684\u4e00\u500b\u91cd\u8981\u7279\u6027\uff0c\u5b83\u5141\u8a31\u7528\u6236\u5728\u67e5\u8a62\u4e2d\u9032\u884c\u66f4\u8907\u96dc\u7684\u8a08\u7b97\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528\u5b50\u67e5\u8a62\u6216\u805a\u5408\u51fd\u6578\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528SQL Server\u7684\u7a97\u53e3\u51fd\u6578\u4f86\u63d0\u9ad8\u7d71\u8a08\u6548\u7387\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b8%ef%bc%9f-xHfyRYasps\">\u4ec0\u9ebc\u662f\u7a97\u53e3\u51fd\u6578\uff1f<\/h2>\n<p>\u7a97\u53e3\u51fd\u6578\u662f\u4e00\u7a2e\u7279\u6b8a\u7684SQL\u51fd\u6578\uff0c\u5b83\u5728\u67e5\u8a62\u7d50\u679c\u96c6\u7684\u6bcf\u4e00\u884c\u4e0a\u57f7\u884c\u8a08\u7b97\uff0c\u4e26\u4e14\u53ef\u4ee5\u8a2a\u554f\u8a72\u884c\u7684\u5176\u4ed6\u884c\u3002\u9019\u4f7f\u5f97\u7a97\u53e3\u51fd\u6578\u5728\u9032\u884c\u7d2f\u8a08\u3001\u6392\u540d\u548c\u79fb\u52d5\u5e73\u5747\u7b49\u64cd\u4f5c\u6642\u975e\u5e38\u6709\u7528\u3002\u8207\u50b3\u7d71\u7684\u805a\u5408\u51fd\u6578\u4e0d\u540c\uff0c\u7a97\u53e3\u51fd\u6578\u4e0d\u6703\u5c07\u7d50\u679c\u96c6\u7e2e\u6e1b\u5230\u55ae\u4e00\u884c\uff0c\u800c\u662f\u4fdd\u7559\u6240\u6709\u884c\uff0c\u4e26\u5728\u6bcf\u4e00\u884c\u4e0a\u8a08\u7b97\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-xHfyRYasps\">\u7a97\u53e3\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u7a97\u53e3\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\u51fd\u6578\u540d\u7a31() OVER (PARTITION BY \u5217\u540d ORDER BY \u5217\u540d)<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>PARTITION BY<\/code>\u5b50\u53e5\u7528\u65bc\u5c07\u7d50\u679c\u96c6\u5206\u7d44\uff0c\u800c<code>ORDER BY<\/code>\u5b50\u53e5\u5247\u7528\u65bc\u5b9a\u7fa9\u8a08\u7b97\u7684\u9806\u5e8f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u7a97\u53e3\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><code>ROW_NUMBER()<\/code>\uff1a\u70ba\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\u3002<\/li>\n<li><code>RANK()<\/code>\uff1a\u70ba\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u6392\u540d\uff0c\u4e26\u5728\u9047\u5230\u76f8\u540c\u503c\u6642\u7d66\u4e88\u76f8\u540c\u7684\u6392\u540d\u3002<\/li>\n<li><code>DENSE_RANK()<\/code>\uff1a\u985e\u4f3c\u65bc<code>RANK()<\/code>\uff0c\u4f46\u4e0d\u6703\u8df3\u904e\u6392\u540d\u3002<\/li>\n<li><code>SUM()<\/code>\uff1a\u8a08\u7b97\u6307\u5b9a\u5217\u7684\u7d2f\u8a08\u548c\u3002<\/li>\n<li><code>AVG()<\/code>\uff1a\u8a08\u7b97\u6307\u5b9a\u5217\u7684\u79fb\u52d5\u5e73\u5747\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-xHfyRYasps\">\u7a97\u53e3\u51fd\u6578\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u7a97\u53e3\u51fd\u6578\u7684\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u8a08\u7b97\u6bcf\u500b\u90e8\u9580\u7684\u54e1\u5de5\u85aa\u8cc7\u6392\u540d\uff1a<\/p>\n<pre><code>SELECT \n    EmployeeID, \n    DepartmentID, \n    Salary, \n    RANK() OVER (PARTITION BY DepartmentID ORDER BY Salary DESC) AS SalaryRank\nFROM \n    Employees;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528<code>RANK()<\/code>\u51fd\u6578\u4f86\u70ba\u6bcf\u500b\u90e8\u9580\u7684\u54e1\u5de5\u6839\u64da\u85aa\u8cc7\u9032\u884c\u6392\u540d\u3002<code>PARTITION BY DepartmentID<\/code>\u78ba\u4fdd\u4e86\u6bcf\u500b\u90e8\u9580\u7684\u6392\u540d\u662f\u7368\u7acb\u8a08\u7b97\u7684\u3002<\/p>\n<h2 id=\"%e6%8f%90%e9%ab%98%e7%b5%b1%e8%a8%88%e6%95%88%e7%8e%87%e7%9a%84%e7%ad%96%e7%95%a5-xHfyRYasps\">\u63d0\u9ad8\u7d71\u8a08\u6548\u7387\u7684\u7b56\u7565<\/h2>\n<p>\u4f7f\u7528\u7a97\u53e3\u51fd\u6578\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u7d71\u8a08\u8a08\u7b97\u7684\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u6578\u64da\u96c6\u6642\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8\u6548\u7387\u7684\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><strong>\u6e1b\u5c11\u5b50\u67e5\u8a62\u7684\u4f7f\u7528\uff1a<\/strong>\u7a97\u53e3\u51fd\u6578\u53ef\u4ee5\u66ff\u4ee3\u8a31\u591a\u9700\u8981\u5b50\u67e5\u8a62\u7684\u60c5\u6cc1\uff0c\u5f9e\u800c\u7c21\u5316\u67e5\u8a62\u7d50\u69cb\u3002<\/li>\n<li><strong>\u5229\u7528\u7d22\u5f15\uff1a<\/strong>\u78ba\u4fdd\u5728<code>PARTITION BY<\/code>\u548c<code>ORDER BY<\/code>\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u7a97\u53e3\u51fd\u6578\uff1a<\/strong>\u6839\u64da\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u7a97\u53e3\u51fd\u6578\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8a08\u7b97\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-xHfyRYasps\">\u7e3d\u7d50<\/h2>\n<p>\u7a97\u53e3\u51fd\u6578\u5728SQL Server\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u63d0\u9ad8\u7d71\u8a08\u8a08\u7b97\u7684\u6548\u7387\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u7a97\u53e3\u51fd\u6578\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u7d50\u69cb\uff0c\u6e1b\u5c11\u8a08\u7b97\u6642\u9593\uff0c\u4e26\u7372\u5f97\u66f4\u6e96\u78ba\u7684\u7d50\u679c\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u5834\u666f\uff0c\u7a97\u53e3\u51fd\u6578\u7121\u7591\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u904b\u884c\u60a8\u7684SQL Server\u5be6\u4f8b\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528SQL Server\u7a97\u53e3\u51fd\u6578\u63d0\u5347\u7d71\u8a08\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u5206\u6790\u904e\u7a0b\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\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-194781","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194781","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=194781"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194781\/revisions"}],"predecessor-version":[{"id":194782,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/194781\/revisions\/194782"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=194781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=194781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=194781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}