{"id":5978,"date":"2024-11-14T14:22:31","date_gmt":"2024-11-14T06:22:31","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5978\/"},"modified":"2024-11-14T14:22:31","modified_gmt":"2024-11-14T06:22:31","slug":"sql%e8%84%9a%e6%9c%ac%e6%98%af%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5978\/","title":{"rendered":"sql\u811a\u672c\u662f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"<blockquote><p>\n  sql \u811a\u672c\u662f\u4e00\u79cd\u5305\u542b sql \u8bed\u53e5\u7684\u6587\u4ef6\uff0c\u7528\u4e8e\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\uff0c\u81ea\u52a8\u5316\u590d\u6742\u64cd\u4f5c\u3002\u5176\u7ed3\u6784\u901a\u5e38\u5305\u62ec\u58f0\u660e\u3001\u67e5\u8be2\u3001\u66f4\u65b0\u548c\u63a7\u5236\u8bed\u53e5\u3002sql \u811a\u672c\u901a\u8fc7\u547d\u4ee4\u884c\u6216 dbms \u6267\u884c\uff0c\u63d0\u4f9b\u81ea\u52a8\u5316\u3001\u53ef\u79fb\u690d\u6027\u3001\u7248\u672c\u63a7\u5236\u548c\u6587\u6863\u7b49\u597d\u5904\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202406\/12\/2024061203452159006.jpg\" class=\"aligncenter\" title=\"sql\u811a\u672c\u662f\u4ec0\u4e48\u610f\u601d\u63d2\u56fe\" alt=\"sql\u811a\u672c\u662f\u4ec0\u4e48\u610f\u601d\u63d2\u56fe\" \/><\/p>\n<p><strong>SQL \u811a\u672c\uff1a<\/strong><\/p>\n<p>SQL \u811a\u672c\u662f\u4e00\u79cd\u5305\u542b SQL \u8bed\u53e5\u7684\u6587\u4ef6\uff0c\u7528\u4e8e\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u5b83\u5141\u8bb8\u7528\u6237\u81ea\u52a8\u5316\u6267\u884c\u590d\u6742\u7684\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u4f8b\u5982\u521b\u5efa\u6570\u636e\u5e93\u3001\u8868\u3001\u63d2\u5165\u548c\u66f4\u65b0\u6570\u636e\u4ee5\u53ca\u751f\u6210\u62a5\u544a\u3002<\/p>\n<p><strong>\u7ed3\u6784\uff1a<\/strong><\/p>\n<p>SQL \u811a\u672c\u901a\u5e38\u7531\u4ee5\u4e0b\u90e8\u5206\u7ec4\u6210\uff1a<\/p>\n<ul>\n<li> <strong>\u58f0\u660e<\/strong>\uff1a\u7528\u4e8e\u521b\u5efa\u6216\u4fee\u6539\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u4f8b\u5982\u8868\u3001\u7d22\u5f15\u6216\u89c6\u56fe\u3002<\/li>\n<li> <strong>\u67e5\u8be2<\/strong>\uff1a\u7528\u4e8e\u68c0\u7d22\u548c\u7b5b\u9009\u6570\u636e\u3002<\/li>\n<li> <strong>\u66f4\u65b0<\/strong>\uff1a\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\u3002<\/li>\n<li> <strong>\u63a7\u5236\u8bed\u53e5<\/strong>\uff1a\u7528\u4e8e\u63a7\u5236\u811a\u672c\u7684\u6267\u884c\u6d41\u7a0b\uff0c\u4f8b\u5982 IF\u3001WHILE \u548c FOR \u5faa\u73af\u3002<\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\uff1a<\/strong><\/p>\n<p>SQL \u811a\u672c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u884c\u5de5\u5177\u6216\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf (DBMS) \u6267\u884c\u3002\u901a\u8fc7\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u6216 DBMS \u754c\u9762\u4e2d\u6267\u884c\u811a\u672c\u6587\u4ef6\u7684\u540d\u79f0\uff0c\u53ef\u4ee5\u8fd0\u884c\u811a\u672c\u3002<\/p>\n<p><strong>\u597d\u5904\uff1a<\/strong><\/p>\n<p>\u4f7f\u7528 SQL \u811a\u672c\u63d0\u4f9b\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n<ul>\n<li> <strong>\u81ea\u52a8\u5316<\/strong>\uff1a\u5141\u8bb8\u81ea\u52a8\u5316\u91cd\u590d\u6027\u6216\u590d\u6742\u7684\u4efb\u52a1\uff0c\u4ece\u800c\u8282\u7701\u65f6\u95f4\u548c\u51cf\u5c11\u9519\u8bef\u3002<\/li>\n<li> <strong>\u53ef\u79fb\u690d\u6027<\/strong>\uff1a\u811a\u672c\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u6570\u636e\u5e93\u7cfb\u7edf\u4e0a\u6267\u884c\uff0c\u65e0\u9700\u8fdb\u884c\u4fee\u6539\u3002<\/li>\n<li> <strong>\u7248\u672c\u63a7\u5236<\/strong>\uff1a\u811a\u672c\u53ef\u4ee5\u4f5c\u4e3a\u6587\u672c\u6587\u4ef6\u8fdb\u884c\u7248\u672c\u63a7\u5236\uff0c\u4ece\u800c\u4fbf\u4e8e\u8ddf\u8e2a\u548c\u7ba1\u7406\u66f4\u6539\u3002<\/li>\n<li> <strong>\u6587\u6863<\/strong>\uff1a\u811a\u672c\u63d0\u4f9b\u64cd\u4f5c\u7684\u4e66\u9762\u8bb0\u5f55\uff0c\u53ef\u7528\u4e8e\u53c2\u8003\u548c\u6545\u969c\u6392\u9664\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b SQL \u811a\u672c\uff1a<\/p>\n<pre>-- \u521b\u5efa\u4e00\u4e2a\u540d\u4e3a \"users\" \u7684\u8868\nCREATE TABLE users (\n    id INT PRIMARY KEY,\n    name VARCHAR(255) NOT NULL,\n    email VARCHAR(255) UNIQUE NOT NULL,\n    password VARCHAR(255) NOT NULL\n);\n\n-- \u63d2\u5165\u6570\u636e\u5230 \"users\" \u8868\u4e2d\nINSERT INTO users (name, email, password) VALUES\n    ('John Doe', 'john.doe@example.com', 'password'),\n    ('Jane Smith', 'jane.smith@example.com', 'password'),\n    ('Bob Jones', 'bob.jones@example.com', 'password');\n\n-- \u67e5\u8be2 \"users\" \u8868\u4e2d\u7684\u6570\u636e\nSELECT * FROM users;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8fd9\u4e2a\u811a\u672c\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a &#8220;users&#8221; \u7684\u8868\uff0c\u63d2\u5165\u4e86\u4e09\u6761\u6570\u636e\u8bb0\u5f55\uff0c\u7136\u540e\u4ece\u8868\u4e2d\u68c0\u7d22\u4e86\u6240\u6709\u6570\u636e\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fsql\u811a\u672c\u662f\u4ec0\u4e48\u610f\u601d\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql \u811a\u672c\u662f\u4e00\u79cd\u5305\u542b sql \u8bed\u53e5\u7684\u6587\u4ef6\uff0c\u7528\u4e8e\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\uff0c\u81ea\u52a8\u5316\u590d\u6742\u64cd\u4f5c\u3002\u5176\u7ed3\u6784\u901a\u5e38\u5305\u62ec\u58f0\u660e\u3001\u67e5\u8be2\u3001\u66f4\u65b0\u548c\u63a7\u5236\u8bed\u53e5\u3002sql \u811a\u672c\u901a\u8fc7\u547d\u4ee4\u884c\u6216 dbms \u6267\u884c\uff0c\u63d0\u4f9b\u81ea\u52a8\u5316\u3001\u53ef\u79fb\u690d\u6027\u3001\u7248\u672c\u63a7\u5236\u548c\u6587\u6863\u7b49\u597d\u5904\u3002 SQL \u811a\u672c\uff1a SQL \u811a\u672c\u662f\u4e00\u79cd\u5305\u542b SQL \u8bed\u53e5\u7684\u6587\u4ef6\uff0c\u7528\u4e8e\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u5b83\u5141\u8bb8\u7528\u6237\u81ea\u52a8\u5316\u6267\u884c\u590d\u6742\u7684\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u4f8b\u5982\u521b\u5efa\u6570\u636e\u5e93\u3001\u8868\u3001\u63d2\u5165\u548c\u66f4\u65b0\u6570\u636e\u4ee5\u53ca\u751f\u6210\u62a5\u544a\u3002 \u7ed3\u6784\uff1a SQL \u811a\u672c\u901a\u5e38\u7531\u4ee5\u4e0b\u90e8\u5206\u7ec4\u6210\uff1a \u58f0\u660e\uff1a\u7528\u4e8e\u521b\u5efa\u6216\u4fee\u6539\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u4f8b\u5982\u8868\u3001\u7d22\u5f15\u6216\u89c6\u56fe\u3002 \u67e5\u8be2\uff1a\u7528\u4e8e\u68c0\u7d22\u548c\u7b5b\u9009\u6570\u636e\u3002 \u66f4\u65b0\uff1a\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\u3002 \u63a7\u5236\u8bed\u53e5\uff1a\u7528\u4e8e\u63a7\u5236\u811a\u672c\u7684\u6267\u884c\u6d41\u7a0b\uff0c\u4f8b\u5982 IF\u3001WHILE \u548c FOR \u5faa\u73af\u3002 \u4f7f\u7528\uff1a SQL \u811a\u672c\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u884c\u5de5\u5177\u6216\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf (DBMS) \u6267\u884c\u3002\u901a\u8fc7\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u6216 DBMS \u754c\u9762\u4e2d\u6267\u884c\u811a\u672c\u6587\u4ef6\u7684\u540d\u79f0\uff0c\u53ef\u4ee5\u8fd0\u884c\u811a\u672c\u3002 \u597d\u5904\uff1a \u4f7f\u7528 SQL \u811a\u672c\u63d0\u4f9b\u4ee5\u4e0b\u597d\u5904\uff1a \u81ea\u52a8\u5316\uff1a\u5141\u8bb8\u81ea\u52a8\u5316\u91cd\u590d\u6027\u6216\u590d\u6742\u7684\u4efb\u52a1\uff0c\u4ece\u800c\u8282\u7701\u65f6\u95f4\u548c\u51cf\u5c11\u9519\u8bef\u3002 \u53ef\u79fb\u690d\u6027\uff1a\u811a\u672c\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u6570\u636e\u5e93\u7cfb\u7edf\u4e0a\u6267\u884c\uff0c\u65e0\u9700\u8fdb\u884c\u4fee\u6539\u3002 \u7248\u672c\u63a7\u5236\uff1a\u811a\u672c\u53ef\u4ee5\u4f5c\u4e3a\u6587\u672c\u6587\u4ef6\u8fdb\u884c\u7248\u672c\u63a7\u5236\uff0c\u4ece\u800c\u4fbf\u4e8e\u8ddf\u8e2a\u548c\u7ba1\u7406\u66f4\u6539\u3002 \u6587\u6863\uff1a\u811a\u672c\u63d0\u4f9b\u64cd\u4f5c\u7684\u4e66\u9762\u8bb0\u5f55\uff0c\u53ef\u7528\u4e8e\u53c2\u8003\u548c\u6545\u969c\u6392\u9664\u3002 \u793a\u4f8b\uff1a \u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b SQL \u811a\u672c\uff1a &#8212; \u521b\u5efa\u4e00\u4e2a\u540d\u4e3a &#8220;users&#8221; \u7684\u8868 CREATE TABLE users ( id INT PRIMARY KEY, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5978","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5978"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5978\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}