{"id":173195,"date":"2024-11-07T15:58:27","date_gmt":"2024-11-07T07:58:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173195\/"},"modified":"2024-11-07T15:58:27","modified_gmt":"2024-11-07T07:58:27","slug":"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%b2%e5%ad%98%e5%9c%a8%e5%b0%8d%e8%b1%a1%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%b2%e5%ad%98%e5%9c%a8%e5%b0%8d%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173195\/","title":{"rendered":"\u5982\u4f55\u8655\u7406\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61\uff1f (\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%b2%e5%ad%98%e5%9c%a8%e5%b0%8d%e8%b1%a1%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%b2%e5%ad%98%e5%9c%a8%e5%b0%8d%e8%b1%a1-FbYqaQVBBn\">\u5982\u4f55\u8655\u7406\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61\uff1f (\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u8655\u7406\u5df2\u5b58\u5728\u5c0d\u8c61\u662f\u4e00\u500b\u5e38\u898b\u7684\u6311\u6230\u3002\u7121\u8ad6\u662f\u8868\u683c\u3001\u7d22\u5f15\u9084\u662f\u5176\u4ed6\u6578\u64da\u5eab\u5c0d\u8c61\uff0c\u7576\u6211\u5011\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u7d93\u5b58\u5728\u7684\u5c0d\u8c61\u6642\uff0c\u7cfb\u7d71\u901a\u5e38\u6703\u8fd4\u56de\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u8655\u7406\u9019\u4e9b\u60c5\u6cc1\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u89e3\u6c7a\u65b9\u6848\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b0%8d%e8%b1%a1%e7%9a%84%e5%ad%98%e5%9c%a8%e6%80%a7-FbYqaQVBBn\">\u7406\u89e3\u6578\u64da\u5eab\u5c0d\u8c61\u7684\u5b58\u5728\u6027<\/h2>\n<p>\u6578\u64da\u5eab\u5c0d\u8c61\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u7684\u5404\u7a2e\u5143\u7d20\uff0c\u4f8b\u5982\u8868\u683c\u3001\u8996\u5716\u3001\u5b58\u5132\u904e\u7a0b\u548c\u7d22\u5f15\u7b49\u3002\u7576\u6211\u5011\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u7684\u5c0d\u8c61\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u6aa2\u67e5\u8a72\u5c0d\u8c61\u7684\u540d\u7a31\u662f\u5426\u5df2\u7d93\u88ab\u4f7f\u7528\u3002\u5982\u679c\u662f\uff0c\u5247\u6703\u8fd4\u56de\u932f\u8aa4\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\u6216\u6578\u64da\u8655\u7406\u5931\u6557\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e5%b0%8d%e8%b1%a1%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8-FbYqaQVBBn\">\u6aa2\u67e5\u5c0d\u8c61\u662f\u5426\u5b58\u5728<\/h2>\n<p>\u5728\u5275\u5efa\u5c0d\u8c61\u4e4b\u524d\uff0c\u6aa2\u67e5\u8a72\u5c0d\u8c61\u662f\u5426\u5df2\u5b58\u5728\u662f\u4e00\u500b\u826f\u597d\u7684\u7de8\u7a0b\u7fd2\u6163\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u6aa2\u67e5\u5c0d\u8c61\u5b58\u5728\u6027\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e5%9c%a8-mysql-%e4%b8%ad-FbYqaQVBBn\">\u5728 MySQL \u4e2d<\/h3>\n<pre><code>CREATE TABLE IF NOT EXISTS my_table (\n    id INT PRIMARY KEY,\n    name VARCHAR(100)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528\u4e86 <code>IF NOT EXISTS<\/code> \u8a9e\u53e5\u4f86\u907f\u514d\u5275\u5efa\u5df2\u5b58\u5728\u7684\u8868\u683c\u3002<\/p>\n<h3 id=\"%e5%9c%a8-sql-server-%e4%b8%ad-FbYqaQVBBn\">\u5728 SQL Server \u4e2d<\/h3>\n<pre><code>IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[my_table]') AND type in (N'U'))\nBEGIN\n    CREATE TABLE my_table (\n        id INT PRIMARY KEY,\n        name NVARCHAR(100)\n    );\nEND;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u9996\u5148\u6aa2\u67e5 <code>my_table<\/code> \u662f\u5426\u5b58\u5728\uff0c\u7136\u5f8c\u518d\u5275\u5efa\u5b83\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e5%b7%b2%e5%ad%98%e5%9c%a8%e5%b0%8d%e8%b1%a1%e7%9a%84%e7%ad%96%e7%95%a5-FbYqaQVBBn\">\u8655\u7406\u5df2\u5b58\u5728\u5c0d\u8c61\u7684\u7b56\u7565<\/h2>\n<p>\u5982\u679c\u5c0d\u8c61\u5df2\u7d93\u5b58\u5728\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><strong>\u66f4\u65b0\u5c0d\u8c61\uff1a<\/strong>\u5982\u679c\u5c0d\u8c61\u7684\u7d50\u69cb\u9700\u8981\u66f4\u6539\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ALTER<\/code> \u8a9e\u53e5\u4f86\u66f4\u65b0\u5b83\u3002<\/li>\n<li><strong>\u522a\u9664\u4e26\u91cd\u65b0\u5275\u5efa\uff1a<\/strong>\u5982\u679c\u60a8\u4e0d\u518d\u9700\u8981\u820a\u7684\u5c0d\u8c61\uff0c\u53ef\u4ee5\u5148\u522a\u9664\u5b83\uff0c\u7136\u5f8c\u518d\u5275\u5efa\u65b0\u7684\u5c0d\u8c61\u3002<\/li>\n<li><strong>\u4f7f\u7528\u7248\u672c\u63a7\u5236\uff1a<\/strong>\u5c0d\u65bc\u983b\u7e41\u8b8a\u66f4\u7684\u5c0d\u8c61\uff0c\u8003\u616e\u4f7f\u7528\u7248\u672c\u63a7\u5236\u4f86\u7ba1\u7406\u4e0d\u540c\u7248\u672c\u7684\u5c0d\u8c61\u3002<\/li>\n<\/ul>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e5%b0%8d%e8%b1%a1%e7%9a%84%e7%a4%ba%e4%be%8b-FbYqaQVBBn\">\u66f4\u65b0\u5c0d\u8c61\u7684\u793a\u4f8b<\/h3>\n<pre><code>ALTER TABLE my_table\nADD age INT;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5728 <code>my_table<\/code> \u4e2d\u6dfb\u52a0\u4e00\u500b\u65b0\u7684\u5217 <code>age<\/code>\u3002<\/p>\n<h3 id=\"%e5%88%aa%e9%99%a4%e4%b8%a6%e9%87%8d%e6%96%b0%e5%89%b5%e5%bb%ba%e7%9a%84%e7%a4%ba%e4%be%8b-FbYqaQVBBn\">\u522a\u9664\u4e26\u91cd\u65b0\u5275\u5efa\u7684\u793a\u4f8b<\/h3>\n<pre><code>DROP TABLE IF EXISTS my_table;\nCREATE TABLE my_table (\n    id INT PRIMARY KEY,\n    name VARCHAR(100)\n);<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u9996\u5148\u522a\u9664 <code>my_table<\/code>\uff0c\u7136\u5f8c\u91cd\u65b0\u5275\u5efa\u5b83\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-FbYqaQVBBn\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u8655\u7406\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u5e6b\u52a9\u60a8\u6e1b\u5c11\u932f\u8aa4\u548c\u63d0\u9ad8\u6548\u7387\uff1a<\/p>\n<ul>\n<li>\u59cb\u7d42\u6aa2\u67e5\u5c0d\u8c61\u662f\u5426\u5b58\u5728\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u932f\u8aa4\u3002<\/li>\n<li>\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u522a\u9664\u548c\u5275\u5efa\u64cd\u4f5c\u6642\u3002<\/li>\n<li>\u4fdd\u6301\u6578\u64da\u5eab\u7d50\u69cb\u7684\u6587\u6a94\u5316\uff0c\u4ee5\u4fbf\u65bc\u5718\u968a\u6210\u54e1\u4e4b\u9593\u7684\u5354\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FbYqaQVBBn\">\u7e3d\u7d50<\/h2>\n<p>\u8655\u7406\u6578\u64da\u5eab\u5df2\u5b58\u5728\u5c0d\u8c61\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7d50\u69cb\u3002\u901a\u904e\u6aa2\u67e5\u5c0d\u8c61\u662f\u5426\u5b58\u5728\u3001\u9078\u64c7\u5408\u9069\u7684\u8655\u7406\u7b56\u7565\u4ee5\u53ca\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u60a8\u53ef\u4ee5\u6e1b\u5c11\u932f\u8aa4\u4e26\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/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>\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u8655\u7406\u6578\u64da\u5eab\u4e2d\u5df2\u5b58\u5728\u7684\u5c0d\u8c61\uff0c\u5305\u62ec\u66f4\u65b0\u3001\u522a\u9664\u548c\u907f\u514d\u91cd\u8907\u6578\u64da\u7684\u6700\u4f73\u5be6\u8e10\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-173195","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173195","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=173195"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173195\/revisions"}],"predecessor-version":[{"id":173196,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173195\/revisions\/173196"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}