{"id":200033,"date":"2025-05-06T09:21:52","date_gmt":"2025-05-06T01:21:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200033\/"},"modified":"2025-05-06T09:21:52","modified_gmt":"2025-05-06T01:21:52","slug":"mysql%e4%b8%ad%e5%a4%96%e9%94%ae%e5%92%8c%e4%b8%bb%e9%94%ae%e4%b9%8b%e9%97%b4%e7%9a%84%e8%87%aa%e5%8a%a8%e5%85%b3%e8%81%94%e8%a7%84%e5%88%99%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200033\/","title":{"rendered":"MySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u5173\u8054\u89c4\u5219\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

MySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u5173\u8054\u89c4\u5219\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u4eca\u5929\u4e3b\u673a\u5b9d\u8d1d\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\uff0c\u5176\u4e2d\u6d89\u53ca\u5230\u7684\u77e5\u8bc6\u70b9\u5305\u62ec\u7b49\u7b49\uff0c\u65e0\u8bba\u4f60\u662f\u5c0f\u767d\u8fd8\u662f\u8001\u624b\uff0c\u90fd\u9002\u5408\u770b\u4e00\u770b\u54e6~\u6709\u597d\u7684\u5efa\u8bae\u4e5f\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u82e5\u662f\u770b\u5b8c\u6709\u6240\u6536\u83b7\uff0c\u4e5f\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u70b9\u8d5e\u652f\u6301\u5440\uff01\u4e00\u8d77\u52a0\u6cb9\u5b66\u4e60~<\/p>\n

MySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u7684\u81ea\u52a8\u8fde\u63a5\u673a\u5236\u662f\u901a\u8fc7\u5efa\u7acb\u5916\u952e\u7ea6\u675f\u6765\u5b9e\u73b0\u7684\u3002\u5916\u952e\u7ea6\u675f\u662f\u4e00\u79cd\u5173\u7cfb\u7ea6\u675f\uff0c\u5728\u4e00\u4e2a\u8868\u4e2d\u7684\u5b57\u6bb5\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u7684\u5b57\u6bb5\u5efa\u7acb\u5173\u8054\uff0c\u4ece\u800c\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4e3b\u952e\u662f\u4e00\u4e2a\u8868\u4e2d\u552f\u4e00\u6807\u8bc6\u6bcf\u4e00\u884c\u6570\u636e\u7684\u5b57\u6bb5\uff0c\u800c\u5916\u952e\u5219\u662f\u53e6\u4e00\u4e2a\u8868\u4e2d\u7684\u4e3b\u952e\uff0c\u7528\u4e8e\u5efa\u7acb\u8868\u4e0e\u8868\u4e4b\u95f4\u7684\u5173\u8054\u3002<\/p>\n

\u5728MySQL\u4e2d\uff0c\u5f53\u6211\u4eec\u5728\u4e00\u4e2a\u8868\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u5916\u952e\uff0c\u5e76\u6307\u5b9a\u5176\u5bf9\u5e94\u7684\u4e3b\u952e\uff0cMySQL\u4f1a\u81ea\u52a8\u5efa\u7acb\u8868\u4e0e\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u5c55\u793a MySQL \u4e2d\u5916\u952e\u548c\u4e3b\u952e\u7684\u81ea\u52a8\u8fde\u63a5\u673a\u5236\uff1a<\/p>\n

\u9996\u5148\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u4e3b\u8868 users<\/code>\uff0c\u5e76\u8bbe\u7f6e\u5176\u4e3b\u952e\u4e3a user_id<\/code>\uff1a<\/p>\n

CREATE TABLE users (\n    user_id INT PRIMARY KEY,\n    username VARCHAR(50)\n);<\/pre>\n
\u63a5\u7740\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u4ece\u8868 orders<\/code>\uff0c\u901a\u8fc7\u5728 orders<\/code> \u8868\u4e2d\u5b9a\u4e49\u5916\u952e user_id<\/code>\uff0c\u4e0e\u4e3b\u8868 users<\/code> \u7684\u4e3b\u952e user_id<\/code> \u5efa\u7acb\u5173\u8054\uff1a<\/p>\n
CREATE TABLE orders (\n    order_id INT PRIMARY KEY,\n    order_date DATE,\n    user_id INT,\n    FOREIGN KEY (user_id) REFERENCES users(user_id)\n);<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0corders<\/code> \u8868\u4e2d\u7684 user_id<\/code> \u5b57\u6bb5\u4e0e users<\/code> \u8868\u4e2d\u7684 user_id<\/code> \u5b57\u6bb5\u5efa\u7acb\u4e86\u5916\u952e\u7ea6\u675f\uff0c\u8fd9\u6837\u5c31\u5b9e\u73b0\u4e86 orders<\/code> \u8868\u4e0e users<\/code> \u8868\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u673a\u5236\u3002\u5f53\u6211\u4eec\u5411 orders<\/code> \u8868\u63d2\u5165\u6570\u636e\u65f6\uff0c\u5982\u679c\u63d2\u5165\u7684 user_id<\/code> \u5728 users<\/code> \u8868\u4e2d\u4e0d\u5b58\u5728\uff0c\u5219\u4f1a\u89e6\u53d1\u5916\u952e\u7ea6\u675f\u7684\u68c0\u67e5\uff0c\u4ece\u800c\u4fdd\u8bc1\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002<\/p>\n
\u603b\u800c\u8a00\u4e4b\uff0cMySQL\u4e2d\u7684\u5916\u952e\u548c\u4e3b\u952e\u7684\u81ea\u52a8\u8fde\u63a5\u673a\u5236\u901a\u8fc7\u5916\u952e\u7ea6\u675f\u6765\u5b9e\u73b0\u8868\u4e0e\u8868\u4e4b\u95f4\u7684\u5173\u8054\uff0c\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aMySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u5173\u8054\u89c4\u5219\u662f\u4ec0\u4e48\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
MySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200033","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200033","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200033"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200033\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}