{"id":166595,"date":"2024-11-05T17:34:26","date_gmt":"2024-11-05T09:34:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/166595\/"},"modified":"2024-11-05T17:34:27","modified_gmt":"2024-11-05T09:34:27","slug":"%e5%bf%ab%e9%80%9f%e5%ad%b8%e6%9c%83%e5%a6%82%e4%bd%95%e6%b7%bb%e5%8a%a0%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84sql%e8%aa%9e%e5%8f%a5-sql%e8%aa%9e%e5%8f%a5-%e6%b7%bb%e5%8a%a0%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/166595\/","title":{"rendered":"\u5feb\u901f\u5b78\u6703\u5982\u4f55\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u7684SQL\u8a9e\u53e5 (sql\u8a9e\u53e5 \u6dfb\u52a0\u6578\u64da\u5eab\u8868)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e5%ad%b8%e6%9c%83%e5%a6%82%e4%bd%95%e6%b7%bb%e5%8a%a0%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84sql%e8%aa%9e%e5%8f%a5-dHmYIyVsXi\">\u5feb\u901f\u5b78\u6703\u5982\u4f55\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u7684SQL\u8a9e\u53e5<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7121\u8ad6\u662f\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u4e86\u89e3\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u8a00\u4f86\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u5fc5\u5099\u7684\u6280\u80fd\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u6dfb\u52a0\u6578\u64da\u5eab\u8868\uff0c\u4e26\u63d0\u4f9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u89e3\u91cb\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql%ef%bc%9f-dHmYIyVsXi\">\u4ec0\u9ebc\u662fSQL\uff1f<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5b83\u5141\u8a31\u7528\u6236\u5275\u5efa\u3001\u8b80\u53d6\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002SQL\u8a9e\u8a00\u7684\u5f37\u5927\u4e4b\u8655\u5728\u65bc\u5176\u7c21\u6f54\u6027\u548c\u9748\u6d3b\u6027\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u8f15\u9b06\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-dHmYIyVsXi\">\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE \u8868\u540d (\n    \u5217\u540d1 \u6578\u64da\u985e\u578b1,\n    \u5217\u540d2 \u6578\u64da\u985e\u578b2,\n    ...\n);<\/code><\/pre>\n<p>\u9019\u6bb5\u8a9e\u6cd5\u7684\u7d44\u6210\u90e8\u5206\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>CREATE TABLE<\/strong>\uff1a\u9019\u662f\u7528\u4f86\u5275\u5efa\u65b0\u8868\u7684\u547d\u4ee4\u3002<\/li>\n<li><strong>\u8868\u540d<\/strong>\uff1a\u6307\u5b9a\u65b0\u8868\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>\u5217\u540d<\/strong>\uff1a\u5b9a\u7fa9\u8868\u4e2d\u7684\u6bcf\u4e00\u5217\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b<\/strong>\uff1a\u6307\u5b9a\u6bcf\u4e00\u5217\u6240\u80fd\u5b58\u5132\u7684\u6578\u64da\u985e\u578b\uff0c\u4f8b\u5982\u6574\u6578\u3001\u5b57\u7b26\u3001\u65e5\u671f\u7b49\u3002<\/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-dHmYIyVsXi\">\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\u7684ID\u3001\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff1a<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY AUTO_INCREMENT,\n    UserName VARCHAR(100) NOT NULL,\n    UserEmail VARCHAR(100) NOT NULL UNIQUE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>UserID<\/strong>\uff1a\u6574\u6578\u985e\u578b\uff0c\u4f5c\u70ba\u4e3b\u9375\u4e26\u81ea\u52d5\u589e\u9577\u3002<\/li>\n<li><strong>UserName<\/strong>\uff1a\u5b57\u7b26\u985e\u578b\uff0c\u6700\u5927\u9577\u5ea6\u70ba100\uff0c\u4e14\u4e0d\u5141\u8a31\u70ba\u7a7a\u3002<\/li>\n<li><strong>UserEmail<\/strong>\uff1a\u5b57\u7b26\u985e\u578b\uff0c\u6700\u5927\u9577\u5ea6\u70ba100\uff0c\u4e14\u5fc5\u9808\u552f\u4e00\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e9%81%b8%e6%93%87-dHmYIyVsXi\">\u6578\u64da\u985e\u578b\u7684\u9078\u64c7<\/h2>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6578\u64da\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>INT<\/strong>\uff1a\u6574\u6578\u985e\u578b\u3002<\/li>\n<li><strong>VARCHAR(n)<\/strong>\uff1a\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0cn\u70ba\u6700\u5927\u9577\u5ea6\u3002<\/li>\n<li><strong>DATE<\/strong>\uff1a\u65e5\u671f\u985e\u578b\u3002<\/li>\n<li><strong>FLOAT<\/strong>\uff1a\u6d6e\u9ede\u6578\u985e\u578b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b7%bb%e5%8a%a0%e8%a1%a8%e5%be%8c%e7%9a%84%e6%93%8d%e4%bd%9c-dHmYIyVsXi\">\u6dfb\u52a0\u8868\u5f8c\u7684\u64cd\u4f5c<\/h2>\n<p>\u5275\u5efa\u8868\u5f8c\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u63d2\u5165\u6578\u64da\u3001\u67e5\u8a62\u6578\u64da\u6216\u4fee\u6539\u8868\u7d50\u69cb\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u64cd\u4f5c\uff1a<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-dHmYIyVsXi\">\u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>INSERT INTO Users (UserName, UserEmail) VALUES ('John Doe', 'john@example.com');<\/code><\/pre>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-dHmYIyVsXi\">\u67e5\u8a62\u6578\u64da<\/h3>\n<pre><code>SELECT * FROM Users;<\/code><\/pre>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b-dHmYIyVsXi\">\u4fee\u6539\u8868\u7d50\u69cb<\/h3>\n<pre><code>ALTER TABLE Users ADD COLUMN UserAge INT;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dHmYIyVsXi\">\u7e3d\u7d50<\/h2>\n<p>\u5b78\u6703\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u6dfb\u52a0\u6578\u64da\u5eab\u8868\u662f\u6578\u64da\u5eab\u7ba1\u7406\u7684\u57fa\u790e\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u8a9e\u6cd5\u548c\u64cd\u4f5c\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u7121\u8ad6\u60a8\u662f\u958b\u767c\u8005\u9084\u662f\u6578\u64da\u5206\u6790\u5e2b\uff0c\u9019\u4e9b\u6280\u80fd\u90fd\u5c07\u5c0d\u60a8\u7684\u5de5\u4f5c\u5927\u6709\u88e8\u76ca\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u7ba1\u7406\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u60a8\u7684\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5feb\u901f\u5b78\u6703\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u6dfb\u52a0\u6578\u64da\u5eab\u8868\uff0c\u638c\u63e1\u57fa\u672c\u8a9e\u6cd5\u548c\u5be6\u7528\u6280\u5de7\uff0c\u8f15\u9b06\u5efa\u7acb\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-166595","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166595","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=166595"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166595\/revisions"}],"predecessor-version":[{"id":166596,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/166595\/revisions\/166596"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=166595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=166595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=166595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}