{"id":154425,"date":"2024-11-02T15:42:18","date_gmt":"2024-11-02T07:42:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154425\/"},"modified":"2024-11-02T15:42:19","modified_gmt":"2024-11-02T07:42:19","slug":"%e5%ba%a6-mssql-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e9%95%b7%e5%ba%a6%e8%aa%bf%e6%95%b4%e6%8c%87%e5%8d%97%ef%bc%88mssql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e6%94%b9%e9%95%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154425\/","title":{"rendered":"\u5ea6 MSSQL \u6578\u64da\u5eab\u5b57\u6bb5\u9577\u5ea6\u8abf\u6574\u6307\u5357\uff08MSSQL \u6578\u64da\u5eab\u600e\u9ebc\u6539\u9577\uff09"},"content":{"rendered":"<h1 id=\"%e5%ba%a6-mssql-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e9%95%b7%e5%ba%a6%e8%aa%bf%e6%95%b4%e6%8c%87%e5%8d%97%ef%bc%88mssql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e6%94%b9%e9%95%b7-rqiipoJNin\">\u5ea6 MSSQL \u6578\u64da\u5eab\u5b57\u6bb5\u9577\u5ea6\u8abf\u6574\u6307\u5357\uff08MSSQL \u6578\u64da\u5eab\u600e\u9ebc\u6539\u9577\uff09<\/h1>\n<p>\u5728\u4f7f\u7528 Microsoft SQL Server (MSSQL) \u7684\u904e\u7a0b\u4e2d\uff0c\u6578\u64da\u5eab\u5b57\u6bb5\u7684\u9577\u5ea6\u8abf\u6574\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u9084\u662f\u56e0\u70ba\u6578\u64da\u7684\u589e\u9577\uff0c\u9069\u6642\u5730\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002\u672c\u6587\u5c07\u63d0\u4f9b\u4e00\u500b\u8a73\u7d30\u7684\u6307\u5357\uff0c\u5e6b\u52a9\u60a8\u4e86\u89e3\u5982\u4f55\u5728 MSSQL \u4e2d\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e8%aa%bf%e6%95%b4%e5%ad%97%e6%ae%b5%e9%95%b7%e5%ba%a6-rqiipoJNin\">\u70ba\u4ec0\u9ebc\u9700\u8981\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6<\/h2>\n<p>\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u7684\u539f\u56e0\u6709\u5f88\u591a\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u589e\u9577\uff1a<\/strong>\u96a8\u8457\u696d\u52d9\u7684\u767c\u5c55\uff0c\u539f\u6709\u5b57\u6bb5\u7684\u9577\u5ea6\u53ef\u80fd\u7121\u6cd5\u6eff\u8db3\u65b0\u7684\u6578\u64da\u9700\u6c42\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u8b8a\u66f4\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5c07\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u5f9e\u8f03\u5c0f\u7684\u985e\u578b\u66f4\u6539\u70ba\u8f03\u5927\u7684\u985e\u578b\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u9069\u7576\u7684\u5b57\u6bb5\u9577\u5ea6\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u6e1b\u5c11\u5b58\u5132\u7a7a\u9593\u7684\u6d6a\u8cbb\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%aa%bf%e6%95%b4%e5%ad%97%e6%ae%b5%e9%95%b7%e5%ba%a6%e7%9a%84%e6%ad%a5%e9%a9%9f-rqiipoJNin\">\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u7684\u6b65\u9a5f<\/h2>\n<p>\u5728 MSSQL \u4e2d\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u7684\u904e\u7a0b\u76f8\u5c0d\u7c21\u55ae\uff0c\u4ee5\u4e0b\u662f\u5177\u9ad4\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%a2%ba%e8%aa%8d%e7%95%b6%e5%89%8d%e5%ad%97%e6%ae%b5%e5%b1%ac%e6%80%a7-rqiipoJNin\">1. \u78ba\u8a8d\u7576\u524d\u5b57\u6bb5\u5c6c\u6027<\/h3>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u66f4\u6539\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u8a8d\u7576\u524d\u5b57\u6bb5\u7684\u5c6c\u6027\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u5b57\u6bb5\u7684\u9577\u5ea6\uff1a<\/p>\n<pre><code>SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH\nFROM INFORMATION_SCHEMA.COLUMNS\nWHERE TABLE_NAME = '\u60a8\u7684\u8868\u540d';<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-alter-table-%e8%aa%9e%e5%8f%a5%e8%aa%bf%e6%95%b4%e5%ad%97%e6%ae%b5%e9%95%b7%e5%ba%a6-rqiipoJNin\">2. \u4f7f\u7528 ALTER TABLE \u8a9e\u53e5\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6<\/h3>\n<p>\u8981\u8abf\u6574\u5b57\u6bb5\u7684\u9577\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 ALTER TABLE \u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d\nALTER COLUMN \u5b57\u6bb5\u540d \u65b0\u6578\u64da\u985e\u578b(\u65b0\u9577\u5ea6);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u60f3\u5c07\u540d\u70ba <code>username<\/code> \u7684\u5b57\u6bb5\u5f9e <code>VARCHAR(50)<\/code> \u8abf\u6574\u70ba <code>VARCHAR(100)<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nALTER COLUMN username VARCHAR(100);<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%9b%b4%e6%94%b9%e7%b5%90%e6%9e%9c-rqiipoJNin\">3. \u6aa2\u67e5\u66f4\u6539\u7d50\u679c<\/h3>\n<p>\u57f7\u884c\u5b8c ALTER TABLE \u8a9e\u53e5\u5f8c\uff0c\u60a8\u53ef\u4ee5\u518d\u6b21\u4f7f\u7528\u7b2c\u4e00\u6b65\u4e2d\u7684\u67e5\u8a62\u4f86\u78ba\u8a8d\u5b57\u6bb5\u9577\u5ea6\u662f\u5426\u5df2\u6210\u529f\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-rqiipoJNin\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u6642\uff0c\u8acb\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u5728\u8abf\u6574\u5b57\u6bb5\u9577\u5ea6\u4e4b\u524d\uff0c\u78ba\u4fdd\u4e0d\u6703\u5f71\u97ff\u5230\u73fe\u6709\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u7d50\u69cb\u6027\u66f4\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u640d\u5931\u3002<\/li>\n<li><strong>\u6027\u80fd\u5f71\u97ff\uff1a<\/strong>\u5927\u898f\u6a21\u7684\u5b57\u6bb5\u9577\u5ea6\u8abf\u6574\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u4f4e\u5cf0\u6642\u6bb5\u9032\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-rqiipoJNin\">\u7d50\u8ad6<\/h2>\n<p>\u8abf\u6574 MSSQL \u6578\u64da\u5eab\u5b57\u6bb5\u7684\u9577\u5ea6\u662f\u4e00\u9805\u91cd\u8981\u7684\u7dad\u8b77\u4efb\u52d9\uff0c\u80fd\u5920\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u548c\u63d0\u5347\u6027\u80fd\u3002\u901a\u904e\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u5b8c\u6210\u9019\u4e00\u904e\u7a0b\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u8abf\u6574MSSQL\u6578\u64da\u5eab\u5b57\u6bb5\u9577\u5ea6\uff0c\u7c21\u55ae\u6b65\u9a5f\u6307\u5c0e\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-154425","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154425","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=154425"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154425\/revisions"}],"predecessor-version":[{"id":154426,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154425\/revisions\/154426"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}