{"id":200076,"date":"2025-05-06T08:15:42","date_gmt":"2025-05-06T00:15:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200076\/"},"modified":"2025-05-06T08:15:42","modified_gmt":"2025-05-06T00:15:42","slug":"%e4%bd%bf%e7%94%a8mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%a4%96%e9%94%ae%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200076\/","title":{"rendered":"\u4f7f\u7528MySQL\u6570\u636e\u5e93\u5916\u952e\u7684\u65b9\u6cd5"},"content":{"rendered":"

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

\u4f7f\u7528MySQL\u6570\u636e\u5e93\u5916\u952e\u7684\u65b9\u6cd5<\/h1>\n

\u5728\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\uff0c\u5916\u952e\u662f\u4e00\u79cd\u81f3\u5173\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u53ef\u4ee5\u5efa\u7acb\u8868\u4e4b\u95f4\u7684\u5173\u8054\u5173\u7cfb\uff0c\u5e76\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002\u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u4f7f\u7528\u5916\u952e\u9700\u8981\u9075\u5faa\u7279\u5b9a\u7684\u6b65\u9aa4\u548c\u8bed\u6cd5\u89c4\u5219\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5728 MySQL \u4e2d\u4f7f\u7528\u5916\u952e\uff0c\u5305\u62ec\u8bbe\u8ba1\u6570\u636e\u5e93\u8868\u7ed3\u6784\u3001\u521b\u5efa\u5916\u952e\u7ea6\u675f\u3001\u5916\u952e\u7684\u4f7f\u7528\u4e0e\u7ef4\u62a4\uff0c\u4ee5\u53ca\u5916\u952e\u5bf9\u67e5\u8be2\u6548\u7387\u7684\u5f71\u54cd\u3002\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u60a8\u53ef\u4ee5\u4e86\u89e3\u5982\u4f55\u5e94\u7528\u5916\u952e\u7ea6\u675f\u6765\u6784\u5efa\u6570\u636e\u5e93\u8868\u7ed3\u6784\uff0c\u5e76\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u67e5\u8be2\u6548\u7387\u3002<\/p>\n

\u5982\u4f55\u5728MySQL\u6570\u636e\u5e93\u4e2d\u4f7f\u7528\u5916\u952e<\/p>\n

\u5728\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\uff0c\u5916\u952e\u662f\u4e00\u79cd\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u5efa\u7acb\u4e0d\u540c\u8868\u4e4b\u95f4\u7684\u5173\u8054\u5173\u7cfb\uff0c\u5e76\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0c\u8981\u4f7f\u7528\u5916\u952e\uff0c\u9700\u8981\u9075\u5faa\u4e00\u5b9a\u7684\u6b65\u9aa4\u548c\u8bed\u6cd5\u89c4\u5219\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528\u5916\u952e\uff0c\u5e76\u9644\u4e0a\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u8bbe\u8ba1\u6570\u636e\u5e93\u8868\u7ed3\u6784
    \u5728\u4f7f\u7528\u5916\u952e\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u8bbe\u8ba1\u597d\u6570\u636e\u5e93\u8868\u7ed3\u6784\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e24\u4e2a\u8868\uff1a\u5b66\u751f\u8868\uff08students\uff09\u548c\u8bfe\u7a0b\u8868\uff08courses\uff09\uff0c\u5b83\u4eec\u4e4b\u95f4\u6709\u4e00\u4e2a\u5173\u8054\u5173\u7cfb\uff0c\u5373\u4e00\u4e2a\u5b66\u751f\u53ef\u4ee5\u9009\u62e9\u591a\u95e8\u8bfe\u7a0b\u3002\u6211\u4eec\u9700\u8981\u5728\u5b66\u751f\u8868\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5916\u952e\uff0c\u5173\u8054\u5230\u8bfe\u7a0b\u8868\u4e2d\u7684\u8bfe\u7a0bID\u3002<\/li>\n<\/ol>\n
    CREATE TABLE students (\n    student_id INT PRIMARY KEY,\n    student_name VARCHAR(50),\n    course_id INT,\n    FOREIGN KEY (course_id) REFERENCES courses(course_id)\n);<\/pre>\n
    \u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5728\u5b66\u751f\u8868\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a\u201ccourse_id\u201d\u7684\u5b57\u6bb5\uff0c\u5b83\u5c06\u4f5c\u4e3a\u5916\u952e\u5173\u8054\u5230\u8bfe\u7a0b\u8868\u4e2d\u7684\u8bfe\u7a0bID\u5b57\u6bb5\u3002\u901a\u8fc7\u201cFOREIGN KEY\u201d\u5173\u952e\u5b57\u548c\u201cREFERENCES\u201d\u5173\u952e\u5b57\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u5916\u952e\u7684\u7ea6\u675f\u6761\u4ef6\uff0c\u786e\u4fdd\u5b66\u751f\u8868\u4e2d\u7684course_id\u53ea\u80fd\u5f15\u7528\u5230\u8bfe\u7a0b\u8868\u4e2d\u5df2\u5b58\u5728\u7684course_id\u3002<\/p>\n
      \n
    1. \u521b\u5efa\u5916\u952e\u7ea6\u675f
      \u5728MySQL\u4e2d\uff0c\u5916\u952e\u7ea6\u675f\u662f\u901a\u8fc7\u5728\u8868\u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u6dfb\u52a0FOREIGN KEY\u8bed\u53e5\u6765\u5b9e\u73b0\u7684\u3002\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5df2\u7ecf\u770b\u5230\u4e86\u5982\u4f55\u5728\u521b\u5efa\u8868\u65f6\u6dfb\u52a0\u5916\u952e\u7ea6\u675f\u3002<\/li>\n<\/ol>\n
      \u5982\u679c\u6211\u4eec\u9700\u8981\u5728\u5df2\u5b58\u5728\u7684\u8868\u4e2d\u6dfb\u52a0\u5916\u952e\u7ea6\u675f\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8bed\u53e5\uff1a<\/p>\n
      ALTER TABLE students\nADD CONSTRAINT fk_course\nFOREIGN KEY (course_id) REFERENCES courses(course_id);<\/pre>\n
      \u4e0a\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5411\u5b66\u751f\u8868\u4e2d\u6dfb\u52a0\u4e86\u4e00\u4e2a\u540d\u4e3a\u201cfk_course\u201d\u7684\u5916\u952e\u7ea6\u675f\uff0c\u786e\u4fddcourse_id\u5b57\u6bb5\u5f15\u7528\u5230\u8bfe\u7a0b\u8868\u4e2d\u7684course_id\u5b57\u6bb5\u3002<\/p>\n
        \n
      1. \u5916\u952e\u7684\u4f7f\u7528\u4e0e\u7ef4\u62a4
        \u5728\u6570\u636e\u5e93\u4e2d\u4f7f\u7528\u5916\u952e\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u7ef4\u62a4\u548c\u64cd\u4f5c\u7684\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5f53\u6211\u4eec\u5220\u9664\u8bfe\u7a0b\u8868\u4e2d\u7684\u4e00\u95e8\u8bfe\u7a0b\u65f6\uff0c\u5982\u679c\u6709\u5b66\u751f\u9009\u62e9\u4e86\u8be5\u8bfe\u7a0b\uff0c\u5c31\u65e0\u6cd5\u76f4\u63a5\u5220\u9664\uff0c\u9700\u8981\u5148\u5220\u9664\u5b66\u751f\u8868\u4e2d\u5bf9\u5e94\u7684\u8bb0\u5f55\uff0c\u6216\u8005\u901a\u8fc7\u8bbe\u7f6e\u7ea7\u8054\u5220\u9664\u6765\u81ea\u52a8\u5220\u9664\u76f8\u5173\u8bb0\u5f55\u3002<\/li>\n<\/ol>\n
        \u5728\u8fdb\u884c\u589e\u5220\u6539\u67e5\u64cd\u4f5c\u65f6\uff0c\u9700\u8981\u8c28\u614e\u5904\u7406\u5916\u952e\u7ea6\u675f\uff0c\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002\u6b64\u5916\uff0c\u5916\u952e\u4e5f\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u4f18\u5316\u67e5\u8be2\u6548\u7387\uff0c\u5728\u5173\u8054\u67e5\u8be2\u65f6\u80fd\u591f\u66f4\u5feb\u5730\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\u3002<\/p>\n
        \u603b\u7ed3
        \u5728MySQL\u6570\u636e\u5e93\u4e2d\u4f7f\u7528\u5916\u952e\u662f\u4e00\u9879\u975e\u5e38\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u5b83\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u5efa\u7acb\u5173\u8054\u5173\u7cfb\uff0c\u5e76\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u60a8\u5e94\u8be5\u5bf9\u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528\u5916\u952e\u6709\u4e86\u66f4\u6e05\u6670\u7684\u4e86\u89e3\uff0c\u5e0c\u671b\u8fd9\u4e9b\u5185\u5bb9\u80fd\u591f\u5e2e\u52a9\u60a8\u66f4\u597d\u5730\u5e94\u7528\u5916\u952e\u7ea6\u675f\u6765\u6784\u5efa\u6570\u636e\u5e93\u8868\u7ed3\u6784\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u5173\u4e8e\u5728MySQL\u6570\u636e\u5e93\u4e2d\u4f7f\u7528\u5916\u952e\u7684\u4ecb\u7ecd\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u5e0c\u671b\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002\u795d\u60a8\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u548c\u7ba1\u7406\u4e2d\u53d6\u5f97\u6210\u529f\uff01<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u300a\u4f7f\u7528MySQL\u6570\u636e\u5e93\u5916\u952e\u7684\u65b9\u6cd5\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eMySQL\u8fde\u63a5,\u6570\u636e\u5173\u7cfb,\u5916\u952e\u7ea6\u675f\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u4f7f\u7528MySQL\u6570\u636e\u5e93\u5916\u952e\u7684\u65b9\u6cd5 ...<\/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-200076","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200076","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=200076"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200076\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}