{"id":168819,"date":"2024-11-06T16:29:31","date_gmt":"2024-11-06T08:29:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168819\/"},"modified":"2024-11-06T16:29:32","modified_gmt":"2024-11-06T08:29:32","slug":"t-sql-with-%e9%97%9c%e9%8d%b5%e5%ad%97%e7%9a%84%e5%af%a6%e4%be%8b%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168819\/","title":{"rendered":"T-SQL with \u95dc\u9375\u5b57\u7684\u5be6\u4f8b\u61c9\u7528"},"content":{"rendered":"<h1 id=\"t-sql%e8%88%87%e9%97%9c%e9%8d%b5%e5%ad%97%e7%9a%84%e5%af%a6%e4%be%8b%e6%87%89%e7%94%a8-GBeAZHKRFC\">T-SQL\u8207\u95dc\u9375\u5b57\u7684\u5be6\u4f8b\u61c9\u7528<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cT-SQL\uff08Transact-SQL\uff09\u662fMicrosoft SQL Server\u7684\u64f4\u5c55SQL\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u67e5\u8a62\u548c\u6578\u64da\u64cd\u4f5c\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0eT-SQL\u4e2d\u7684\u95dc\u9375\u5b57\u53ca\u5176\u5be6\u4f8b\u61c9\u7528\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5229\u7528\u9019\u4e9b\u95dc\u9375\u5b57\u9032\u884c\u6578\u64da\u64cd\u4f5c\u548c\u67e5\u8a62\u3002<\/p>\n<h2 id=\"t-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-GBeAZHKRFC\">T-SQL\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>T-SQL\u4e0d\u50c5\u50c5\u662f\u4e00\u7a2e\u67e5\u8a62\u8a9e\u8a00\uff0c\u5b83\u9084\u5305\u62ec\u4e86\u63a7\u5236\u6d41\u7a0b\u7684\u8a9e\u53e5\u3001\u932f\u8aa4\u8655\u7406\u3001\u8b8a\u6578\u548c\u5176\u4ed6\u529f\u80fd\u3002T-SQL\u7684\u95dc\u9375\u5b57\u662f\u69cb\u5efa\u67e5\u8a62\u548c\u6578\u64da\u64cd\u4f5c\u7684\u57fa\u790e\uff0c\u4e86\u89e3\u9019\u4e9b\u95dc\u9375\u5b57\u7684\u7528\u6cd5\u5c0d\u65bc\u6709\u6548\u4f7f\u7528T-SQL\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e7%94%a8%e7%9a%84t-sql%e9%97%9c%e9%8d%b5%e5%ad%97-GBeAZHKRFC\">\u5e38\u7528\u7684T-SQL\u95dc\u9375\u5b57<\/h2>\n<ul>\n<li><code>SELECT<\/code>\uff1a\u7528\u65bc\u5f9e\u6578\u64da\u8868\u4e2d\u9078\u64c7\u6578\u64da\u3002<\/li>\n<li><code>INSERT<\/code>\uff1a\u7528\u65bc\u5411\u6578\u64da\u8868\u4e2d\u63d2\u5165\u65b0\u6578\u64da\u3002<\/li>\n<li><code>UPDATE<\/code>\uff1a\u7528\u65bc\u66f4\u65b0\u6578\u64da\u8868\u4e2d\u7684\u73fe\u6709\u6578\u64da\u3002<\/li>\n<li><code>DELETE<\/code>\uff1a\u7528\u65bc\u522a\u9664\u6578\u64da\u8868\u4e2d\u7684\u6578\u64da\u3002<\/li>\n<li><code>WHERE<\/code>\uff1a\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u689d\u4ef6\u3002<\/li>\n<li><code>JOIN<\/code>\uff1a\u7528\u65bc\u9023\u63a5\u591a\u500b\u6578\u64da\u8868\u3002<\/li>\n<li><code>GROUP BY<\/code>\uff1a\u7528\u65bc\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u5206\u7d44\u3002<\/li>\n<li><code>ORDER BY<\/code>\uff1a\u7528\u65bc\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%97%9c%e9%8d%b5%e5%ad%97%e7%9a%84%e5%af%a6%e4%be%8b%e6%87%89%e7%94%a8-GBeAZHKRFC\">\u95dc\u9375\u5b57\u7684\u5be6\u4f8b\u61c9\u7528<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8select%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-GBeAZHKRFC\">1. \u4f7f\u7528SELECT\u67e5\u8a62\u6578\u64da<\/h3>\n<pre><code>SELECT FirstName, LastName \nFROM Employees \nWHERE Department = 'Sales';<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u5f9e<code>Employees<\/code>\u8868\u4e2d\u9078\u64c7\u6240\u6709\u5728\u92b7\u552e\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u7684\u540d\u5b57\u548c\u59d3\u6c0f\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8insert%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-GBeAZHKRFC\">2. \u4f7f\u7528INSERT\u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>INSERT INTO Employees (FirstName, LastName, Department) \nVALUES ('John', 'Doe', 'Marketing');<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u4e00\u540d\u540d\u70baJohn Doe\u7684\u54e1\u5de5\u63d2\u5165\u5230<code>Employees<\/code>\u8868\u4e2d\uff0c\u4e26\u6307\u5b9a\u5176\u90e8\u9580\u70ba\u5e02\u5834\u90e8\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8update%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-GBeAZHKRFC\">3. \u4f7f\u7528UPDATE\u66f4\u65b0\u6578\u64da<\/h3>\n<pre><code>UPDATE Employees \nSET Department = 'HR' \nWHERE LastName = 'Doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u6240\u6709\u59d3Doe\u7684\u54e1\u5de5\u7684\u90e8\u9580\u66f4\u65b0\u70ba\u4eba\u529b\u8cc7\u6e90\u90e8\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8delete%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-GBeAZHKRFC\">4. \u4f7f\u7528DELETE\u522a\u9664\u6578\u64da<\/h3>\n<pre><code>DELETE FROM Employees \nWHERE FirstName = 'John' AND LastName = 'Doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u522a\u9664\u540d\u70baJohn Doe\u7684\u54e1\u5de5\u8a18\u9304\u3002<\/p>\n<h3 id=\"5-%e4%bd%bf%e7%94%a8join%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e8%a1%a8-GBeAZHKRFC\">5. \u4f7f\u7528JOIN\u9023\u63a5\u6578\u64da\u8868<\/h3>\n<pre><code>SELECT Employees.FirstName, Employees.LastName, Departments.DepartmentName \nFROM Employees \nJOIN Departments ON Employees.DepartmentID = Departments.ID;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u5f9e<code>Employees<\/code>\u548c<code>Departments<\/code>\u8868\u4e2d\u9078\u64c7\u54e1\u5de5\u7684\u540d\u5b57\u3001\u59d3\u6c0f\u53ca\u5176\u6240\u5c6c\u90e8\u9580\u7684\u540d\u7a31\u3002<\/p>\n<h3 id=\"6-%e4%bd%bf%e7%94%a8group-by%e5%92%8corder-by%e9%80%b2%e8%a1%8c%e5%88%86%e7%b5%84%e5%92%8c%e6%8e%92%e5%ba%8f-GBeAZHKRFC\">6. \u4f7f\u7528GROUP BY\u548cORDER BY\u9032\u884c\u5206\u7d44\u548c\u6392\u5e8f<\/h3>\n<pre><code>SELECT Department, COUNT(*) AS EmployeeCount \nFROM Employees \nGROUP BY Department \nORDER BY EmployeeCount DESC;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u6839\u64da\u90e8\u9580\u5c0d\u54e1\u5de5\u9032\u884c\u5206\u7d44\uff0c\u4e26\u6309\u54e1\u5de5\u6578\u91cf\u964d\u5e8f\u6392\u5217\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GBeAZHKRFC\">\u7e3d\u7d50<\/h2>\n<p>T-SQL\u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u901a\u904e\u4f7f\u7528\u5404\u7a2e\u95dc\u9375\u5b57\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u548c\u67e5\u8a62\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u6578\u64da\u3001\u63d2\u5165\u65b0\u8a18\u9304\uff0c\u9084\u662f\u66f4\u65b0\u548c\u522a\u9664\u73fe\u6709\u6578\u64da\uff0cT-SQL\u90fd\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\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<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Explore practical applications of T-SQL with keyword examples to enhance your database management skills and optimize query performance.<\/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-168819","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168819","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=168819"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168819\/revisions"}],"predecessor-version":[{"id":168820,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168819\/revisions\/168820"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}