{"id":71131,"date":"2024-10-15T14:46:15","date_gmt":"2024-10-15T06:46:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/71131\/"},"modified":"2024-10-15T14:46:15","modified_gmt":"2024-10-15T06:46:15","slug":"mssql%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%b8%80%e6%ad%a5%e6%ad%a5%e4%ba%86%e8%a7%a3%ef%bc%81%ef%bc%88mssql%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/71131\/","title":{"rendered":"MSSQL\u57f7\u884c\u9806\u5e8f\u89e3\u6790\uff1a\u4e00\u6b65\u6b65\u4e86\u89e3\uff01\uff08mssql\u57f7\u884c\u9806\u5e8f\uff09"},"content":{"rendered":"<h1 id=\"mssql%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%b8%80%e6%ad%a5%e6%ad%a5%e4%ba%86%e8%a7%a3%ef%bc%81-mFlChddXRn\">MSSQL\u57f7\u884c\u9806\u5e8f\u89e3\u6790\uff1a\u4e00\u6b65\u6b65\u4e86\u89e3\uff01<\/h1>\n<p>\u5728\u4f7f\u7528 Microsoft SQL Server (MSSQL) \u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c\u4e86\u89e3\u5176\u57f7\u884c\u9806\u5e8f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u4f7f\u4ed6\u5011\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u5eab\u7684\u904b\u4f5c\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MSSQL \u7684\u57f7\u884c\u9806\u5e8f\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"mssql%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e6%a6%82%e8%bf%b0-mFlChddXRn\">MSSQL\u57f7\u884c\u9806\u5e8f\u6982\u8ff0<\/h2>\n<p>MSSQL \u7684\u67e5\u8a62\u57f7\u884c\u9806\u5e8f\u4e26\u4e0d\u662f\u6309\u7167 SQL \u8a9e\u53e5\u7684\u66f8\u5beb\u9806\u5e8f\u4f86\u57f7\u884c\u7684\u3002\u76f8\u53cd\uff0cSQL Server \u6703\u6839\u64da\u5167\u90e8\u908f\u8f2f\u4f86\u6c7a\u5b9a\u57f7\u884c\u7684\u6b65\u9a5f\u3002\u4ee5\u4e0b\u662f MSSQL \u67e5\u8a62\u7684\u57fa\u672c\u57f7\u884c\u9806\u5e8f\uff1a<\/p>\n<ol>\n<li>FROM<\/li>\n<li>JOIN<\/li>\n<li>WHERE<\/li>\n<li>GROUP BY<\/li>\n<li>HAVING<\/li>\n<li>SELECT<\/li>\n<li>ORDER BY<\/li>\n<li>TOP<\/li>\n<\/ol>\n<h2 id=\"%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e8%a9%b3%e8%a7%a3-mFlChddXRn\">\u57f7\u884c\u9806\u5e8f\u8a73\u89e3<\/h2>\n<h3 id=\"1-from-mFlChddXRn\">1. FROM<\/h3>\n<p>\u67e5\u8a62\u7684\u7b2c\u4e00\u6b65\u662f\u78ba\u5b9a\u6578\u64da\u4f86\u6e90\u3002\u9019\u5305\u62ec\u6307\u5b9a\u8981\u67e5\u8a62\u7684\u8868\u683c\u6216\u8996\u5716\u3002\u9019\u4e00\u6b65\u9a5f\u6703\u78ba\u5b9a\u54ea\u4e9b\u6578\u64da\u5c07\u88ab\u6aa2\u7d22\u3002<\/p>\n<pre><code>SELECT * FROM Employees;<\/code><\/pre>\n<h3 id=\"2-join-mFlChddXRn\">2. JOIN<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u8868\u683c\uff0c\u5247\u5728\u9019\u4e00\u6b65\u9032\u884c\u8868\u683c\u4e4b\u9593\u7684\u806f\u63a5\u3002\u9019\u53ef\u4ee5\u662f\u5167\u806f\u63a5\u3001\u5916\u806f\u63a5\u7b49\u3002<\/p>\n<pre><code>SELECT * FROM Employees e\nJOIN Departments d ON e.DepartmentID = d.ID;<\/code><\/pre>\n<h3 id=\"3-where-mFlChddXRn\">3. WHERE<\/h3>\n<p>\u5728\u78ba\u5b9a\u4e86\u6578\u64da\u4f86\u6e90\u5f8c\uff0c\u63a5\u4e0b\u4f86\u6703\u6839\u64da\u6307\u5b9a\u7684\u689d\u4ef6\u904e\u6ffe\u6578\u64da\u3002\u9019\u4e00\u6b65\u9a5f\u6703\u6392\u9664\u4e0d\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002<\/p>\n<pre><code>SELECT * FROM Employees\nWHERE Salary &gt; 50000;<\/code><\/pre>\n<h3 id=\"4-group-by-mFlChddXRn\">4. GROUP BY<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u9700\u8981\u9032\u884c\u805a\u5408\u8a08\u7b97\uff0c\u5247\u6703\u5728\u9019\u4e00\u6b65\u9032\u884c\u5206\u7d44\u3002\u9019\u901a\u5e38\u8207\u805a\u5408\u51fd\u6578\uff08\u5982 COUNT\u3001SUM \u7b49\uff09\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n<pre><code>SELECT DepartmentID, COUNT(*) AS EmployeeCount\nFROM Employees\nGROUP BY DepartmentID;<\/code><\/pre>\n<h3 id=\"5-having-mFlChddXRn\">5. HAVING<\/h3>\n<p>\u5728\u5206\u7d44\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528 HAVING \u5b50\u53e5\u9032\u4e00\u6b65\u904e\u6ffe\u805a\u5408\u7d50\u679c\u3002\u9019\u8207 WHERE \u5b50\u53e5\u985e\u4f3c\uff0c\u4f46 HAVING \u662f\u91dd\u5c0d\u805a\u5408\u7d50\u679c\u9032\u884c\u7684\u3002<\/p>\n<pre><code>SELECT DepartmentID, COUNT(*) AS EmployeeCount\nFROM Employees\nGROUP BY DepartmentID\nHAVING COUNT(*) &gt; 5;<\/code><\/pre>\n<h3 id=\"6-select-mFlChddXRn\">6. SELECT<\/h3>\n<p>\u9019\u4e00\u6b65\u9a5f\u662f\u5be6\u969b\u9078\u64c7\u8981\u8fd4\u56de\u7684\u5217\u3002\u9019\u662f\u67e5\u8a62\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u6c7a\u5b9a\u4e86\u6700\u7d42\u7d50\u679c\u96c6\u7684\u5167\u5bb9\u3002<\/p>\n<pre><code>SELECT Name, Salary FROM Employees;<\/code><\/pre>\n<h3 id=\"7-order-by-mFlChddXRn\">7. ORDER BY<\/h3>\n<p>\u5728\u9078\u64c7\u4e86\u6240\u9700\u7684\u6578\u64da\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528 ORDER BY \u5b50\u53e5\u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u9019\u53ef\u4ee5\u662f\u5347\u5e8f\u6216\u964d\u5e8f\u3002<\/p>\n<pre><code>SELECT Name, Salary FROM Employees\nORDER BY Salary DESC;<\/code><\/pre>\n<h3 id=\"8-top-mFlChddXRn\">8. TOP<\/h3>\n<p>\u6700\u5f8c\uff0cTOP \u5b50\u53e5\u53ef\u4ee5\u7528\u4f86\u9650\u5236\u8fd4\u56de\u7684\u8a18\u9304\u6578\u91cf\u3002\u9019\u5728\u9700\u8981\u7372\u53d6\u524d N \u689d\u8a18\u9304\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>SELECT TOP 10 Name, Salary FROM Employees\nORDER BY Salary DESC;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mFlChddXRn\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3 MSSQL \u7684\u57f7\u884c\u9806\u5e8f\u5c0d\u65bc\u512a\u5316\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u638c\u63e1\u9019\u4e9b\u6b65\u9a5f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u64b0\u5beb SQL \u67e5\u8a62\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u82e5\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5eab\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\uff0c\u52a9\u60a8\u4e00\u81c2\u4e4b\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790MSSQL\u57f7\u884c\u9806\u5e8f\uff0c\u9010\u6b65\u4e86\u89e3\u67e5\u8a62\u8655\u7406\u6d41\u7a0b\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\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-71131","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/71131","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=71131"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/71131\/revisions"}],"predecessor-version":[{"id":71132,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/71131\/revisions\/71132"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=71131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=71131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=71131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}