{"id":200062,"date":"2025-05-06T09:00:30","date_gmt":"2025-05-06T01:00:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200062\/"},"modified":"2025-05-06T09:00:30","modified_gmt":"2025-05-06T01:00:30","slug":"%e8%ae%be%e7%bd%ae%e5%92%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%ef%bc%9amysql-%e5%a4%8d%e5%90%88%e4%b8%bb%e9%94%ae","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200062\/","title":{"rendered":"\u8bbe\u7f6e\u548c\u6ce8\u610f\u4e8b\u9879\uff1aMySQL \u590d\u5408\u4e3b\u952e"},"content":{"rendered":"

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

\u8bbe\u7f6e\u548c\u6ce8\u610f\u4e8b\u9879\uff1aMySQL \u590d\u5408\u4e3b\u952e<\/h1>\n

\u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u590d\u5408\u4e3b\u952e\u7531\u591a\u4e2a\u5b57\u6bb5\u7ec4\u6210\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u3002\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\u65f6\uff0c\u9700\u8981\u5728\u521b\u5efa\u8868\u65f6\u6307\u5b9a\u53c2\u4e0e\u4e3b\u952e\u7684\u5b57\u6bb5\uff0c\u5e76\u7528\u62ec\u53f7\u62ec\u8d77\u6765\uff0c\u5728\u62ec\u53f7\u524d\u52a0\u4e0a PRIMARY KEY \u5173\u952e\u5b57\u3002\u590d\u5408\u4e3b\u952e\u5e38\u7528\u4e8e\u9700\u8981\u901a\u8fc7\u591a\u4e2a\u5b57\u6bb5\u552f\u4e00\u6807\u8bc6\u8bb0\u5f55\u7684\u60c5\u51b5\uff0c\u5982\u8ba2\u5355\u8868\u4e2d\u7684\u8ba2\u5355\u53f7\u548c\u5ba2\u6237\u53f7\u3002\u5728\u8bbe\u8ba1\u590d\u5408\u4e3b\u952e\u65f6\uff0c\u9700\u8981\u8003\u8651\u5b57\u6bb5\u987a\u5e8f\u3001\u9009\u62e9\u4e0d\u53ef\u53d8\u5b57\u6bb5\u4f5c\u4e3a\u4e3b\u952e\uff0c\u5e76\u786e\u4fdd\u63d2\u5165\u6570\u636e\u7684\u552f\u4e00\u6027\u3002\u901a\u8fc7\u5408\u7406\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u548c\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n

MySQL \u590d\u5408\u4e3b\u952e\u7684\u8bbe\u7f6e\u65b9\u6cd5\u4e0e\u6ce8\u610f\u4e8b\u9879<\/p>\n

\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0c\u4e3b\u952e\u662f\u4e00\u79cd\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u6bcf\u6761\u8bb0\u5f55\u7684\u5b57\u6bb5\u6216\u5b57\u6bb5\u7ec4\u5408\u3002\u9664\u4e86\u53ef\u4ee5\u8bbe\u7f6e\u5355\u4e2a\u5b57\u6bb5\u4f5c\u4e3a\u4e3b\u952e\u5916\uff0c\u8fd8\u53ef\u4ee5\u8bbe\u7f6e\u591a\u4e2a\u5b57\u6bb5\u7ec4\u5408\u4f5c\u4e3a\u590d\u5408\u4e3b\u952e\u3002\u672c\u6587\u5c06\u4ecb\u7ecdMySQL\u4e2d\u590d\u5408\u4e3b\u952e\u7684\u8bbe\u7f6e\u65b9\u6cd5\u3001\u4f7f\u7528\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879\uff0c\u5e76\u9644\u6709\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\u7684\u65b9\u6cd5\uff1a
\u5728\u521b\u5efa\u8868\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u8bed\u6cd5\u6765\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\uff1a<\/p>\n

CREATE TABLE table_name (\n    column1 data_type,\n    column2 data_type,\n    ...\n    PRIMARY KEY (column1, column2)\n);<\/pre>\n
\u5176\u4e2dcolumn1<\/code>\u548ccolumn2<\/code>\u4e3a\u8868\u4e2d\u7684\u4e24\u4e2a\u5b57\u6bb5\uff0c\u5b83\u4eec\u4e00\u8d77\u7ec4\u6210\u4e86\u590d\u5408\u4e3b\u952e\u3002\u5728\u521b\u5efa\u8868\u65f6\uff0c\u5c06\u8fd9\u4e24\u4e2a\u5b57\u6bb5\u7528\u62ec\u53f7\u62ec\u8d77\u6765\uff0c\u5e76\u5728\u62ec\u53f7\u524d\u52a0\u4e0aPRIMARY KEY<\/code>\u5173\u952e\u5b57\uff0c\u5373\u53ef\u5c06\u5b83\u4eec\u8bbe\u7f6e\u4e3a\u590d\u5408\u4e3b\u952e\u3002<\/p>\n
\u4f7f\u7528\u590d\u5408\u4e3b\u952e\u7684\u573a\u666f\uff1a<\/p>\n
    \n
  1. \u5f53\u67d0\u5f20\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u90fd\u9700\u8981\u901a\u8fc7\u591a\u4e2a\u5b57\u6bb5\u552f\u4e00\u6807\u8bc6\u65f6\uff0c\u9002\u5408\u4f7f\u7528\u590d\u5408\u4e3b\u952e\u3002\u6bd4\u5982\u5728\u4e00\u4e2a\u8ba2\u5355\u8868\u4e2d\uff0c\u8ba2\u5355\u53f7\u548c\u5ba2\u6237\u53f7\u4e00\u8d77\u53ef\u4ee5\u552f\u4e00\u786e\u5b9a\u4e00\u6761\u8ba2\u5355\u8bb0\u5f55\u3002<\/li>\n
  2. \u5728\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u548c\u6392\u5e8f\u65f6\uff0c\u5982\u679c\u9700\u8981\u6839\u636e\u591a\u4e2a\u5b57\u6bb5\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f7f\u7528\u590d\u5408\u4e3b\u952e\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<\/ol>\n
    \u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n
      \n
    1. \u590d\u5408\u4e3b\u952e\u7684\u5b57\u6bb5\u987a\u5e8f\u5f88\u91cd\u8981\uff0c\u56e0\u4e3a\u5b57\u6bb5\u7684\u987a\u5e8f\u51b3\u5b9a\u4e86\u7d22\u5f15\u7684\u987a\u5e8f\u3002\u5728\u8bbe\u8ba1\u590d\u5408\u4e3b\u952e\u65f6\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u4e1a\u52a1\u9700\u6c42\u6765\u786e\u5b9a\u5b57\u6bb5\u7684\u987a\u5e8f\u3002<\/li>\n
    2. \u590d\u5408\u4e3b\u952e\u7684\u5b57\u6bb5\u5e94\u5c3d\u91cf\u9009\u62e9\u4e0d\u53ef\u53d8\u7684\u5b57\u6bb5\u4f5c\u4e3a\u4e3b\u952e\uff0c\u907f\u514d\u5728\u4e3b\u952e\u4e0a\u9891\u7e41\u4fee\u6539\u5b57\u6bb5\u503c\uff0c\u4ee5\u514d\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\u3002<\/li>\n
    3. \u590d\u5408\u4e3b\u952e\u5728\u6570\u636e\u63d2\u5165\u65f6\u8981\u786e\u4fdd\u552f\u4e00\u6027\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u63d2\u5165\u5931\u8d25\u3002\u53ef\u4ee5\u4f7f\u7528INSERT IGNORE<\/code>\u6216ON DUPLICATE KEY UPDATE<\/code>\u8bed\u53e5\u6765\u5904\u7406\u91cd\u590d\u4e3b\u952e\u7684\u60c5\u51b5\u3002<\/li>\n<\/ol>\n
      \u4e0b\u9762\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u793a\u4f8b\uff1a<\/p>\n
      \u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3astudent<\/code>\u7684\u8868\uff0c\u5305\u542b\u5b66\u751f\u7684\u5b66\u53f7\uff08student_id\uff09\u3001\u73ed\u7ea7\u53f7\uff08class_id\uff09\u548c\u59d3\u540d\uff08name\uff09\u5b57\u6bb5\uff0c\u73b0\u5728\u9700\u8981\u5c06student_id<\/code>\u548cclass_id<\/code>\u4e24\u4e2a\u5b57\u6bb5\u7ec4\u5408\u4f5c\u4e3a\u590d\u5408\u4e3b\u952e\u3002<\/p>\n
      CREATE TABLE student (\n    student_id INT,\n    class_id INT,\n    name VARCHAR(50),\n    PRIMARY KEY (student_id, class_id)\n);<\/pre>\n
      \u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5982\u4f55\u5728MySQL\u4e2d\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\uff0c\u5e76\u4e86\u89e3\u4e86\u590d\u5408\u4e3b\u952e\u7684\u4f7f\u7528\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u4e1a\u52a1\u9700\u6c42\u548c\u6570\u636e\u5e93\u8bbe\u8ba1\u89c4\u8303\uff0c\u5408\u7406\u8bbe\u7f6e\u590d\u5408\u4e3b\u952e\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u548c\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n
      \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u8bbe\u7f6e\u548c\u6ce8\u610f\u4e8b\u9879\uff1aMySQL \u590d\u5408\u4e3b\u952e\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6570\u636e\u5e93\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n
      \n
      \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      \u8bbe\u7f6e\u548c\u6ce8\u610f\u4e8b\u9879\uff1aMySQL \u590d\u5408...<\/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-200062","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200062","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=200062"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200062\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}