{"id":67993,"date":"2024-10-15T05:52:16","date_gmt":"2024-10-14T21:52:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/67993\/"},"modified":"2024-10-15T05:52:16","modified_gmt":"2024-10-14T21:52:16","slug":"mssql%e7%b6%93%e5%85%b8%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%e5%af%a6%e6%88%b0%ef%bc%88mssql%e7%b6%93%e5%85%b8%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/67993\/","title":{"rendered":"MSSQL\u7d93\u5178\u67e5\u8a62\u8a9e\u53e5\u5be6\u6230\uff08mssql\u7d93\u5178\u67e5\u8a62\u8a9e\u53e5\uff09"},"content":{"rendered":"<h1 id=\"mssql%e7%b6%93%e5%85%b8%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%e5%af%a6%e6%88%b0-tZxGzLpFMy\">MSSQL\u7d93\u5178\u67e5\u8a62\u8a9e\u53e5\u5be6\u6230<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMicrosoft SQL Server\uff08MSSQL\uff09\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u638c\u63e1MSSQL\u7684\u67e5\u8a62\u8a9e\u53e5\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u6578\u64da\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u7d93\u5178\u7684MSSQL\u67e5\u8a62\u8a9e\u53e5\uff0c\u5e6b\u52a9\u8b80\u8005\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u66f4\u6709\u6548\u5730\u64cd\u4f5c\u6578\u64da\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-tZxGzLpFMy\">\u57fa\u672c\u67e5\u8a62\u8a9e\u53e5<\/h2>\n<p>\u6700\u57fa\u672c\u7684\u67e5\u8a62\u8a9e\u53e5\u662f\u4f7f\u7528 <code>SELECT<\/code> \u4f86\u5f9e\u6578\u64da\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM Customers;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u5f9e\u540d\u70ba <code>Customers<\/code> \u7684\u8868\u4e2d\u6aa2\u7d22\u6240\u6709\u5217\u7684\u6578\u64da\u3002\u5982\u679c\u53ea\u9700\u8981\u7279\u5b9a\u7684\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT CustomerID, CustomerName FROM Customers;<\/code><\/pre>\n<h2 id=\"%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-tZxGzLpFMy\">\u689d\u4ef6\u67e5\u8a62<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u4f86\u7be9\u9078\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u6240\u6709\u4f86\u81ea\u300c\u9999\u6e2f\u300d\u7684\u5ba2\u6236\uff1a<\/p>\n<pre><code>SELECT * FROM Customers WHERE City = '\u9999\u6e2f';<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\u4f86\u7d44\u5408\u591a\u500b\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT * FROM Customers WHERE City = '\u9999\u6e2f' AND Country = '\u4e2d\u570b';<\/code><\/pre>\n<h2 id=\"%e6%8e%92%e5%ba%8f%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-tZxGzLpFMy\">\u6392\u5e8f\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\u53ef\u4ee5\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c07\u5ba2\u6236\u6309\u540d\u7a31\u5347\u5e8f\u6392\u5217\uff1a<\/p>\n<pre><code>SELECT * FROM Customers ORDER BY CustomerName ASC;<\/code><\/pre>\n<p>\u5982\u679c\u9700\u8981\u964d\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>DESC<\/code>\uff1a<\/p>\n<pre><code>SELECT * FROM Customers ORDER BY CustomerName DESC;<\/code><\/pre>\n<h2 id=\"%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8-tZxGzLpFMy\">\u805a\u5408\u51fd\u6578<\/h2>\n<p>MSSQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u5982 <code>COUNT<\/code>\u3001<code>SUM<\/code>\u3001<code>AVG<\/code>\u3001<code>MIN<\/code> \u548c <code>MAX<\/code>\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u8a08\u7b97\u6578\u64da\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u8a08\u7b97\u5ba2\u6236\u7684\u7e3d\u6578\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM Customers;<\/code><\/pre>\n<p>\u8a08\u7b97\u67d0\u500b\u57ce\u5e02\u7684\u5ba2\u6236\u6578\u91cf\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM Customers WHERE City = '\u9999\u6e2f';<\/code><\/pre>\n<h2 id=\"%e5%88%86%e7%b5%84%e6%9f%a5%e8%a9%a2-tZxGzLpFMy\">\u5206\u7d44\u67e5\u8a62<\/h2>\n<p>\u4f7f\u7528 <code>GROUP BY<\/code> \u5b50\u53e5\u53ef\u4ee5\u5c07\u67e5\u8a62\u7d50\u679c\u6309\u67d0\u4e00\u5217\u9032\u884c\u5206\u7d44\uff0c\u4e26\u7d50\u5408\u805a\u5408\u51fd\u6578\u9032\u884c\u7d71\u8a08\u3002\u4f8b\u5982\uff0c\u6309\u57ce\u5e02\u5206\u7d44\u4e26\u8a08\u7b97\u6bcf\u500b\u57ce\u5e02\u7684\u5ba2\u6236\u6578\u91cf\uff1a<\/p>\n<pre><code>SELECT City, COUNT(*) AS CustomerCount FROM Customers GROUP BY City;<\/code><\/pre>\n<h2 id=\"%e8%81%af%e6%8e%a5%e6%9f%a5%e8%a9%a2-tZxGzLpFMy\">\u806f\u63a5\u67e5\u8a62<\/h2>\n<p>\u5728\u591a\u500b\u8868\u4e4b\u9593\u9032\u884c\u67e5\u8a62\u6642\uff0c\u806f\u63a5\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u5167\u90e8\u806f\u63a5\u7684\u793a\u4f8b\uff0c\u5c07 <code>Customers<\/code> \u8868\u548c <code>Orders<\/code> \u8868\u806f\u63a5\uff0c\u67e5\u8a62\u6bcf\u4f4d\u5ba2\u6236\u7684\u8a02\u55ae\uff1a<\/p>\n<pre><code>SELECT Customers.CustomerName, Orders.OrderID \nFROM Customers \nINNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID;<\/code><\/pre>\n<h2 id=\"%e5%b0%8f%e7%b5%90-tZxGzLpFMy\">\u5c0f\u7d50<\/h2>\n<p>\u638c\u63e1MSSQL\u7684\u7d93\u5178\u67e5\u8a62\u8a9e\u53e5\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u4ecb\u7d39\u4e86\u57fa\u672c\u67e5\u8a62\u3001\u689d\u4ef6\u67e5\u8a62\u3001\u6392\u5e8f\u3001\u805a\u5408\u51fd\u6578\u3001\u5206\u7d44\u67e5\u8a62\u548c\u806f\u63a5\u67e5\u8a62\u7b49\u5e38\u7528\u8a9e\u53e5\u3002\u9019\u4e9b\u67e5\u8a62\u8a9e\u53e5\u4e0d\u50c5\u80fd\u5e6b\u52a9\u7528\u6236\u9ad8\u6548\u5730\u6aa2\u7d22\u6578\u64da\uff0c\u9084\u80fd\u9032\u884c\u6df1\u5165\u7684\u6578\u64da\u5206\u6790\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4e0a\u904b\u884cMSSQL\uff0c\u6216\u5c0b\u627e\u9069\u5408\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MSSQL\u7d93\u5178\u67e5\u8a62\u8a9e\u53e5\u5be6\u6230\uff0c\u638c\u63e1\u9ad8\u6548\u6578\u64da\u67e5\u8a62\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u8207\u5206\u6790\u80fd\u529b\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-67993","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/67993","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=67993"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/67993\/revisions"}],"predecessor-version":[{"id":67994,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/67993\/revisions\/67994"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=67993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=67993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=67993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}