{"id":199612,"date":"2025-05-06T10:12:09","date_gmt":"2025-05-06T02:12:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199612\/"},"modified":"2025-05-06T10:12:09","modified_gmt":"2025-05-06T02:12:09","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e8%af%ad%e5%8f%a5%e5%9c%a8mysql%e4%b8%ad%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e8%bf%9e%e6%8e%a5%e5%92%8c%e8%81%94%e5%90%88%e6%9f%a5%e8%af%a2%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199612\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230\uff0c\u5982\u679c\u4f60\u5bf9\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n

\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff1f<\/p>\n

\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\u662f SQL \u8bed\u8a00\u4e2d\u5e38\u7528\u7684\u6280\u5de7\uff0c\u80fd\u591f\u5728\u591a\u4e2a\u8868\u4e2d\u83b7\u53d6\u548c\u7b5b\u9009\u6240\u9700\u7684\u6570\u636e\u3002\u5728 MySQL \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 JOIN \u5b50\u53e5\u6765\u5b9e\u73b0\u6570\u636e\u8fde\u63a5\uff0c\u4f7f\u7528 UNION \u548c UNION ALL \u5b50\u53e5\u6765\u5b9e\u73b0\u6570\u636e\u7684\u8054\u5408\u67e5\u8be2\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 SQL \u8bed\u53e5\u5728 MySQL \u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u6570\u636e\u8fde\u63a5\uff1a<\/li>\n<\/ol>\n

    \u6570\u636e\u8fde\u63a5\u662f\u5c06\u591a\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u901a\u8fc7\u5171\u540c\u7684\u5217\u8fdb\u884c\u5173\u8054\uff0c\u4ee5\u5f97\u5230\u6240\u9700\u7684\u6570\u636e\u3002\u5728 MySQL \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 INNER JOIN\u3001LEFT JOIN\u3001RIGHT JOIN \u548c FULL JOIN \u56db\u79cd\u8fde\u63a5\u65b9\u5f0f\u3002\u4e0b\u9762\u662f\u5bf9\u5b83\u4eec\u7684\u5177\u4f53\u89e3\u91ca\u548c\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

      \n
    • INNER JOIN \uff08\u5185\u8fde\u63a5\uff09\uff1a\u53ea\u8fd4\u56de\u5728\u8fde\u63a5\u6761\u4ef6\u4e0b\u4e24\u4e2a\u8868\u4e2d\u90fd\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<\/ul>\n
      SELECT \u5217\u540d\nFROM \u88681\nINNER JOIN \u88682\nON \u88681.\u5217\u540d = \u88682.\u5217\u540d;<\/pre>\n
        \n
      • LEFT JOIN\uff08\u5de6\u8fde\u63a5\uff09\uff1a\u8fd4\u56de\u5de6\u4fa7\u8868\uff08\u5373\u7b2c\u4e00\u4e2a\u8868\uff09\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4ee5\u53ca\u53f3\u4fa7\u8868\u4e2d\u4e0e\u5de6\u4fa7\u8868\u5339\u914d\u7684\u884c\u3002<\/li>\n<\/ul>\n
        SELECT \u5217\u540d\nFROM \u88681\nLEFT JOIN \u88682\nON \u88681.\u5217\u540d = \u88682.\u5217\u540d;<\/pre>\n
          \n
        • RIGHT JOIN\uff08\u53f3\u8fde\u63a5\uff09\uff1a\u8fd4\u56de\u53f3\u4fa7\u8868\uff08\u5373\u7b2c\u4e8c\u4e2a\u8868\uff09\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4ee5\u53ca\u5de6\u4fa7\u8868\u4e2d\u4e0e\u53f3\u4fa7\u8868\u5339\u914d\u7684\u884c\u3002<\/li>\n<\/ul>\n
          SELECT \u5217\u540d\nFROM \u88681\nRIGHT JOIN \u88682\nON \u88681.\u5217\u540d = \u88682.\u5217\u540d;<\/pre>\n
            \n
          • FULL JOIN\uff08\u5168\u8fde\u63a5\uff09\uff1a\u8fd4\u56de\u5de6\u53f3\u4e24\u4fa7\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u65e0\u8bba\u5339\u914d\u4e0e\u5426\u3002<\/li>\n<\/ul>\n
            SELECT \u5217\u540d\nFROM \u88681\nFULL JOIN \u88682\nON \u88681.\u5217\u540d = \u88682.\u5217\u540d;<\/pre>\n
              \n
            1. \u8054\u5408\u67e5\u8be2\uff1a<\/li>\n<\/ol>\n
              \u8054\u5408\u67e5\u8be2\u7528\u4e8e\u7ec4\u5408\u591a\u4e2a SELECT \u8bed\u53e5\u7684\u7ed3\u679c\u96c6\uff0c\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6240\u6709\u7ed3\u679c\u7684\u4e34\u65f6\u8868\u3002\u5728 MySQL \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 UNION \u548c UNION ALL \u4e24\u79cd\u65b9\u5f0f\u8fdb\u884c\u8054\u5408\u67e5\u8be2\u3002\u4e0b\u9762\u662f\u5bf9\u5b83\u4eec\u7684\u5177\u4f53\u89e3\u91ca\u548c\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
                \n
              • UNION\uff1a\u8fd4\u56de\u4e24\u4e2a\u6216\u591a\u4e2a SELECT \u8bed\u53e5\u7684\u7ed3\u679c\u96c6\uff0c\u53bb\u9664\u91cd\u590d\u7684\u884c\u3002<\/li>\n<\/ul>\n
                SELECT \u5217\u540d\nFROM \u88681\nWHERE \u6761\u4ef6\nUNION\nSELECT \u5217\u540d\nFROM \u88682\nWHERE \u6761\u4ef6;<\/pre>\n
                  \n
                • UNION ALL\uff1a\u8fd4\u56de\u4e24\u4e2a\u6216\u591a\u4e2a SELECT \u8bed\u53e5\u7684\u7ed3\u679c\u96c6\uff0c\u5305\u542b\u91cd\u590d\u7684\u884c\u3002<\/li>\n<\/ul>\n
                  SELECT \u5217\u540d\nFROM \u88681\nWHERE \u6761\u4ef6\nUNION ALL\nSELECT \u5217\u540d\nFROM \u88682\nWHERE \u6761\u4ef6;<\/pre>\n
                  \u4ee5\u4e0a\u5c31\u662f\u4f7f\u7528 SQL \u8bed\u53e5\u5728 MySQL \u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\u7684\u57fa\u672c\u65b9\u6cd5\u548c\u4ee3\u7801\u793a\u4f8b\u3002\u901a\u8fc7\u7075\u6d3b\u8fd0\u7528\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u4ece\u591a\u4e2a\u8868\u4e2d\u83b7\u53d6\u548c\u7b5b\u9009\u6240\u9700\u7684\u6570\u636e\uff0c\u5e76\u6ee1\u8db3\u4e0d\u540c\u7684\u6570\u636e\u5206\u6790\u548c\u67e5\u8be2\u9700\u6c42\u3002\u795d\u4f60\u5728\u4f7f\u7528 SQL \u8bed\u53e5\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u65f6\u53d6\u5f97\u5706\u6ee1\u7684\u7ed3\u679c\uff01<\/p>\n
                  \u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u8fde\u63a5\u548c\u8054\u5408\u67e5\u8be2\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
                  \n
                  \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
                  \u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d...<\/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-199612","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199612","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=199612"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199612\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}