{"id":185340,"date":"2024-11-10T20:44:19","date_gmt":"2024-11-10T12:44:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185340\/"},"modified":"2024-11-10T20:44:20","modified_gmt":"2024-11-10T12:44:20","slug":"%e4%bd%bf%e7%94%a8tsql%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e6%a0%bc%e7%b5%90%e6%a7%8b%e7%9a%84%e6%96%b9%e6%b3%95%e5%8f%8a%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85%ef%bc%88t-sql%e4%bf%ae","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185340\/","title":{"rendered":"\u4f7f\u7528TSQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\u7684\u65b9\u6cd5\u53ca\u6ce8\u610f\u4e8b\u9805\uff08t-sql\u4fee\u6539\u6578\u64da\u5eab\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8tsql%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e6%a0%bc%e7%b5%90%e6%a7%8b%e7%9a%84%e6%96%b9%e6%b3%95%e5%8f%8a%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-IoIHRuPMOk\">\u4f7f\u7528TSQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\u7684\u65b9\u6cd5\u53ca\u6ce8\u610f\u4e8b\u9805<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u4fee\u6539\u8868\u683c\u7d50\u69cb\u662f\u4e00\u9805\u5e38\u898b\u7684\u4efb\u52d9\u3002\u4f7f\u7528T-SQL\uff08Transact-SQL\uff09\u4f86\u9032\u884c\u9019\u4e9b\u4fee\u6539\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528T-SQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9805\uff0c\u4ee5\u78ba\u4fdd\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u548c\u6709\u6548\u6027\u3002<\/p>\n<h2 id=\"t-sql%e4%bf%ae%e6%94%b9%e8%a1%a8%e6%a0%bc%e7%b5%90%e6%a7%8b%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-IoIHRuPMOk\">T-SQL\u4fee\u6539\u8868\u683c\u7d50\u69cb\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728T-SQL\u4e2d\uff0c\u4fee\u6539\u8868\u683c\u7d50\u69cb\u4e3b\u8981\u4f7f\u7528\u4ee5\u4e0b\u5e7e\u500b\u547d\u4ee4\uff1a<\/p>\n<ul>\n<li><code>ALTER TABLE<\/code>\uff1a\u7528\u65bc\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u8868\u683c\u4e2d\u7684\u5217\u3002<\/li>\n<li><code>DROP TABLE<\/code>\uff1a\u7528\u65bc\u522a\u9664\u6574\u500b\u8868\u683c\u3002<\/li>\n<li><code>CREATE TABLE<\/code>\uff1a\u7528\u65bc\u5275\u5efa\u65b0\u8868\u683c\u3002<\/li>\n<\/ul>\n<h3 id=\"1-%e6%b7%bb%e5%8a%a0%e5%88%97-IoIHRuPMOk\">1. \u6dfb\u52a0\u5217<\/h3>\n<p>\u8981\u5728\u73fe\u6709\u8868\u683c\u4e2d\u6dfb\u52a0\u65b0\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u683c\u540d\u7a31\nADD \u65b0\u5217\u540d\u7a31 \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u540d\u70ba<code>Employees<\/code>\u7684\u8868\u683c\u4e2d\u6dfb\u52a0\u4e00\u500b\u540d\u70ba<code>BirthDate<\/code>\u7684\u65e5\u671f\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE Employees\nADD BirthDate DATE;<\/code><\/pre>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e5%88%97-IoIHRuPMOk\">2. \u522a\u9664\u5217<\/h3>\n<p>\u82e5\u8981\u522a\u9664\u8868\u683c\u4e2d\u7684\u67d0\u4e00\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u683c\u540d\u7a31\nDROP COLUMN \u5217\u540d\u7a31;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5f9e<code>Employees<\/code>\u8868\u683c\u4e2d\u522a\u9664<code>BirthDate<\/code>\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE Employees\nDROP COLUMN BirthDate;<\/code><\/pre>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e5%88%97-IoIHRuPMOk\">3. \u4fee\u6539\u5217<\/h3>\n<p>\u8981\u4fee\u6539\u73fe\u6709\u5217\u7684\u6578\u64da\u985e\u578b\u6216\u5176\u4ed6\u5c6c\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u683c\u540d\u7a31\nALTER COLUMN \u5217\u540d\u7a31 \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07<code>Employees<\/code>\u8868\u683c\u4e2d\u7684<code>LastName<\/code>\u5217\u7684\u6578\u64da\u985e\u578b\u6539\u70ba<code>VARCHAR(100)<\/code>\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>ALTER TABLE Employees\nALTER COLUMN LastName VARCHAR(100);<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-IoIHRuPMOk\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528T-SQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\u6642\uff0c\u6709\u5e7e\u500b\u91cd\u8981\u7684\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u7d50\u69cb\u4fee\u6539\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u6aa2\u67e5\u4f9d\u8cf4\u6027\uff1a<\/strong>\u5728\u522a\u9664\u6216\u4fee\u6539\u5217\u4e4b\u524d\uff0c\u6aa2\u67e5\u662f\u5426\u6709\u5176\u4ed6\u8868\u683c\u6216\u8996\u5716\u4f9d\u8cf4\u65bc\u8a72\u5217\uff0c\u907f\u514d\u9020\u6210\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u74b0\u5883\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u9032\u884c\u4fee\u6539\u4e4b\u524d\uff0c\u6700\u597d\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u5148\u9032\u884c\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u4fee\u6539\u4e0d\u6703\u5f15\u767c\u554f\u984c\u3002<\/li>\n<li><strong>\u6027\u80fd\u5f71\u97ff\uff1a<\/strong>\u67d0\u4e9b\u7d50\u69cb\u4fee\u6539\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u8868\u683c\u4e0a\u9032\u884c\u64cd\u4f5c\u6642\uff0c\u61c9\u8003\u616e\u5728\u4f4e\u5cf0\u6642\u6bb5\u9032\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-IoIHRuPMOk\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528T-SQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002\u901a\u904e\u6b63\u78ba\u7684\u8a9e\u6cd5\u548c\u6ce8\u610f\u4e8b\u9805\uff0c\u53ef\u4ee5\u78ba\u4fdd\u4fee\u6539\u904e\u7a0b\u7684\u5b89\u5168\u6027\u548c\u6709\u6548\u6027\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u904b\u884c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u9078\u64c7\u5408\u9069\u7684<code>VPS<\/code>\u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u82e5\u60a8\u5c0d\u65bc<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u4f7f\u7528TSQL\u4fee\u6539\u6578\u64da\u5eab\u8868\u683c\u7d50\u69cb\u7684\u65b9\u6cd5\u53ca\u6ce8\u610f\u4e8b\u9805\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u8207\u6027\u80fd\u512a\u5316\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-185340","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185340","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=185340"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185340\/revisions"}],"predecessor-version":[{"id":185341,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185340\/revisions\/185341"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}