{"id":143841,"date":"2024-11-01T01:42:19","date_gmt":"2024-10-31T17:42:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143841\/"},"modified":"2024-11-01T01:42:20","modified_gmt":"2024-10-31T17:42:20","slug":"sql-%e5%bb%ba%e8%a1%a8%ef%bc%9a%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%89%b5%e5%bb%ba%e6%96%b0%e8%a1%a8%e6%a0%bc%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-sql-%e5%bb%ba%e7%ab%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143841\/","title":{"rendered":"SQL \u5efa\u8868\uff1a\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u65b0\u8868\u683c\uff1f (\u6578\u64da\u5eab sql \u5efa\u7acb\u8868 039)"},"content":{"rendered":"<h1 id=\"sql-%e5%bb%ba%e8%a1%a8%ef%bc%9a%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%89%b5%e5%bb%ba%e6%96%b0%e8%a1%a8%e6%a0%bc%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-sql-%e5%bb%ba%e7%ab%8b-hipGTioMQe\">SQL \u5efa\u8868\uff1a\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u65b0\u8868\u683c\uff1f (\u6578\u64da\u5eab sql \u5efa\u7acb\u8868 039)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5275\u5efa\u65b0\u8868\u683c\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u57fa\u672c\u6b65\u9a5f\u4e4b\u4e00\u3002\u8868\u683c\u662f\u7528\u4f86\u5b58\u5132\u6578\u64da\u7684\u7d50\u69cb\uff0c\u901a\u904e\u8868\u683c\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u7d44\u7e54\u548c\u7ba1\u7406\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u8a00\u5728\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u65b0\u8868\u683c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sql-%e5%bb%ba%e8%a1%a8%ef%bc%9f-hipGTioMQe\">\u4ec0\u9ebc\u662f SQL \u5efa\u8868\uff1f<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5efa\u8868\u662f SQL \u4e2d\u7684\u4e00\u500b\u57fa\u672c\u64cd\u4f5c\uff0c\u901a\u904e\u9019\u500b\u64cd\u4f5c\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u5b9a\u7fa9\u8868\u683c\u7684\u7d50\u69cb\uff0c\u5305\u62ec\u8868\u683c\u7684\u540d\u7a31\u3001\u6b04\u4f4d\u540d\u7a31\u3001\u6578\u64da\u985e\u578b\u53ca\u7d04\u675f\u689d\u4ef6\u7b49\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%a0%bc%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-hipGTioMQe\">\u5275\u5efa\u8868\u683c\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u5275\u5efa\u8868\u683c\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE \u8868\u683c\u540d\u7a31 (\n    \u6b04\u4f4d1 \u6578\u64da\u985e\u578b [\u7d04\u675f],\n    \u6b04\u4f4d2 \u6578\u64da\u985e\u578b [\u7d04\u675f],\n    ...\n);<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<strong>\u8868\u683c\u540d\u7a31<\/strong>\u662f\u4f60\u8981\u5275\u5efa\u7684\u8868\u683c\u7684\u540d\u7a31\uff0c<strong>\u6b04\u4f4d<\/strong>\u662f\u8868\u683c\u4e2d\u7684\u5217\uff0c<strong id=\"%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-hipGTioMQe\">\u6578\u64da\u985e\u578b<\/strong>\u5b9a\u7fa9\u4e86\u8a72\u5217\u53ef\u4ee5\u5b58\u5132\u7684\u6578\u64da\u985e\u578b\uff0c\u800c<strong>\u7d04\u675f<\/strong>\u5247\u7528\u4f86\u9650\u5236\u8a72\u5217\u7684\u6578\u64da\u8f38\u5165\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-hipGTioMQe\">\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728\u5275\u5efa\u8868\u683c\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5e38\u898b\u7684\u6578\u64da\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>INT<\/strong>\uff1a\u6574\u6578\u985e\u578b<\/li>\n<li><strong>VARCHAR(n)<\/strong>\uff1a\u53ef\u8b8a\u9577\u5ea6\u5b57\u7b26\u4e32\uff0cn \u70ba\u6700\u5927\u9577\u5ea6<\/li>\n<li><strong>DATE<\/strong>\uff1a\u65e5\u671f\u985e\u578b<\/li>\n<li><strong>FLOAT<\/strong>\uff1a\u6d6e\u9ede\u6578\u985e\u578b<\/li>\n<li><strong>BOOLEAN<\/strong>\uff1a\u5e03\u723e\u985e\u578b<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e7%94%a8%e6%88%b6%e8%a1%a8-hipGTioMQe\">\u7bc4\u4f8b\uff1a\u5275\u5efa\u4e00\u500b\u7528\u6236\u8868<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u7528\u6236\u8868\u7684\u7bc4\u4f8b\uff0c\u8a72\u8868\u5305\u542b\u7528\u6236\u7684 ID\u3001\u59d3\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u548c\u8a3b\u518a\u65e5\u671f\uff1a<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY AUTO_INCREMENT,\n    UserName VARCHAR(100) NOT NULL,\n    Email VARCHAR(100) UNIQUE NOT NULL,\n    RegistrationDate DATE DEFAULT CURRENT_DATE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>UserID<\/strong> \u662f\u4e3b\u9375\uff0c\u4e26\u4e14\u6703\u81ea\u52d5\u905e\u589e\u3002<\/li>\n<li><strong>UserName<\/strong> \u548c <strong>Email<\/strong> \u662f\u5fc5\u586b\u6b04\u4f4d\uff0c\u4e26\u4e14 <strong>Email<\/strong> \u662f\u552f\u4e00\u7684\u3002<\/li>\n<li><strong>RegistrationDate<\/strong> \u7684\u9ed8\u8a8d\u503c\u662f\u7576\u524d\u65e5\u671f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-hipGTioMQe\">\u7d04\u675f\u689d\u4ef6<\/h2>\n<p>\u5728\u5275\u5efa\u8868\u683c\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u7d04\u675f\u689d\u4ef6\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6b63\u78ba\u6027\u3002\u5e38\u898b\u7684\u7d04\u675f\u689d\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>PRIMARY KEY<\/strong>\uff1a\u4e3b\u9375\uff0c\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u884c\u6578\u64da\u3002<\/li>\n<li><strong>FOREIGN KEY<\/strong>\uff1a\u5916\u9375\uff0c\u5efa\u7acb\u8868\u683c\u4e4b\u9593\u7684\u95dc\u806f\u3002<\/li>\n<li><strong>UNIQUE<\/strong>\uff1a\u78ba\u4fdd\u67d0\u4e00\u5217\u7684\u6578\u64da\u552f\u4e00\u3002<\/li>\n<li><strong>NOT NULL<\/strong>\uff1a\u78ba\u4fdd\u67d0\u4e00\u5217\u7684\u6578\u64da\u4e0d\u70ba\u7a7a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hipGTioMQe\">\u7e3d\u7d50<\/h2>\n<p>\u5275\u5efa\u65b0\u8868\u683c\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6b65\u9a5f\uff0c\u901a\u904e SQL \u8a9e\u8a00\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u5b9a\u7fa9\u8868\u683c\u7684\u7d50\u69cb\u548c\u7d04\u675f\u689d\u4ef6\u3002\u638c\u63e1 SQL \u5efa\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u548c\u6578\u64da\u985e\u578b\u9078\u64c7\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u6578\u64da\u5eab\u7ba1\u7406\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\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u4f7f\u7528 SQL \u5efa\u7acb\u65b0\u8868\u683c\uff0c\u638c\u63e1\u57fa\u672c\u8a9e\u6cd5\u548c\u6b65\u9a5f\uff0c\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u7d50\u69cb\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-143841","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143841","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=143841"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143841\/revisions"}],"predecessor-version":[{"id":143842,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143841\/revisions\/143842"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143841"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}