{"id":5894,"date":"2024-11-14T09:40:11","date_gmt":"2024-11-14T01:40:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5894\/"},"modified":"2024-11-14T09:40:11","modified_gmt":"2024-11-14T01:40:11","slug":"sql%e6%9f%a5%e8%af%a2%e6%80%8e%e4%b9%88%e5%8a%a0%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5894\/","title":{"rendered":"sql\u67e5\u8be2\u600e\u4e48\u52a0\u7d22\u5f15"},"content":{"rendered":"

\n \u7d22\u5f15\u662f\u4e00\u79cd\u901a\u8fc7\u6392\u5e8f\u6570\u636e\u5217\u6765\u52a0\u901f\u6570\u636e\u67e5\u627e\u7684\u6570\u636e\u7ed3\u6784\u3002\u4e3a sql \u67e5\u8be2\u6dfb\u52a0\u7d22\u5f15\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u786e\u5b9a\u9700\u8981\u7d22\u5f15\u7684\u5217\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\uff08b \u6811\u3001\u54c8\u5e0c\u6216\u4f4d\u56fe\uff09\u3002\u4f7f\u7528 create index \u547d\u4ee4\u521b\u5efa\u7d22\u5f15\u3002\u5b9a\u671f\u91cd\u5efa\u6216\u91cd\u65b0\u7ec4\u7ec7\u7d22\u5f15\u4ee5\u7ef4\u62a4\u5176\u6548\u7387\u3002\u6dfb\u52a0\u7d22\u5f15\u7684\u597d\u5904\u5305\u62ec\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3001\u51cf\u5c11 i\/o \u64cd\u4f5c\u3001\u4f18\u5316\u6392\u5e8f\u548c\u7b5b\u9009\u4ee5\u53ca\u63d0\u9ad8\u5e76\u53d1\u6027\u3002\u5f53\u67e5\u8be2\u7ecf\u5e38\u4f7f\u7528\u7279\u5b9a\u5217\u3001\u8fd4\u56de\u5927\u91cf\u6570\u636e\u9700\u8981\u6392\u5e8f\u6216\u5206\u7ec4\u3001\u6d89\u53ca\u591a\u4e2a\u8868\u6216\u6570\u636e\u5e93\u8868\u8f83\u5927\u65f6\uff0c\u5e94\u8be5\u8003\u8651\u6dfb\u52a0\u7d22\u5f15\u3002\n<\/p><\/blockquote>\n

\"sql\u67e5\u8be2\u600e\u4e48\u52a0\u7d22\u5f15\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4e3a SQL \u67e5\u8be2\u6dfb\u52a0\u7d22\u5f15<\/h2>\n

\u4ec0\u4e48\u662f\u7d22\u5f15<\/strong><\/p>\n

\u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u8bb0\u5f55\u3002\u5b83\u901a\u8fc7\u5c06\u6570\u636e\u5217\u53ca\u5176\u5bf9\u5e94\u503c\u6392\u5e8f\u548c\u5b58\u50a8\uff0c\u4ee5\u4fbf\u6570\u636e\u5e93\u53ef\u4ee5\u66f4\u5feb\u5730\u8bbf\u95ee\u5b83\u4eec\uff0c\u4ece\u800c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n

\u5982\u4f55\u6dfb\u52a0\u7d22\u5f15<\/strong><\/p>\n

\u8981\u5728 SQL \u67e5\u8be2\u4e2d\u6dfb\u52a0\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

    \n
  1. \u786e\u5b9a\u9700\u8981\u7d22\u5f15\u7684\u5217\uff1a<\/strong>\u9009\u62e9\u5728\u67e5\u8be2\u4e2d\u7ecf\u5e38\u4f7f\u7528\u7684\u5217\u6216\u7ecf\u5e38\u8fdb\u884c\u6392\u5e8f\u6216\u7b5b\u9009\u7684\u5217\u3002<\/li>\n
  2. \u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1a<\/strong>\u6709\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec B \u6811\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u4f4d\u56fe\u7d22\u5f15\u3002\u9009\u62e9\u6700\u9002\u5408\u67e5\u8be2\u9700\u6c42\u7684\u7c7b\u578b\u3002<\/li>\n
  3. \u521b\u5efa\u7d22\u5f15\uff1a<\/strong>\u4f7f\u7528 SQL \u547d\u4ee4 CREATE INDEX \u521b\u5efa\u7d22\u5f15\u3002\u8be5\u547d\u4ee4\u5c06\u6307\u5b9a\u7d22\u5f15\u540d\u79f0\u3001\u5217\u540d\u79f0\u548c\u7d22\u5f15\u7c7b\u578b\u3002<\/li>\n
  4. \u7ef4\u62a4\u7d22\u5f15\uff1a<\/strong>\u4e00\u65e6\u521b\u5efa\u7d22\u5f15\uff0c\u5b83\u9700\u8981\u901a\u8fc7\u5b9a\u671f\u91cd\u5efa\u6216\u91cd\u65b0\u7ec4\u7ec7\u6765\u7ef4\u62a4\uff0c\u4ee5\u4fdd\u6301\u5176\u6548\u7387\u3002<\/li>\n<\/ol>\n

    \u6dfb\u52a0\u7d22\u5f15\u7684\u597d\u5904<\/strong><\/p>\n

    \u6dfb\u52a0\u7d22\u5f15\u53ef\u4ee5\u5e26\u6765\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n

      \n
    • \u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff1a<\/strong>\u7d22\u5f15\u53ef\u4ee5\u663e\u7740\u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u8bbf\u95ee\u5927\u91cf\u6570\u636e\u65f6\u3002<\/li>\n
    • \u51cf\u5c11 I\/O \u64cd\u4f5c\uff1a<\/strong>\u7d22\u5f15\u6709\u52a9\u4e8e\u51cf\u5c11\u786c\u76d8\u4e0a\u7684 I\/O \u64cd\u4f5c\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n
    • \u4f18\u5316\u6392\u5e8f\u548c\u7b5b\u9009\uff1a<\/strong>\u7d22\u5f15\u4f7f\u6392\u5e8f\u548c\u7b5b\u9009\u67e5\u8be2\u53d8\u5f97\u66f4\u52a0\u9ad8\u6548\uff0c\u56e0\u4e3a\u6570\u636e\u5df2\u7ecf\u6309\u7d22\u5f15\u952e\u6392\u5e8f\u3002<\/li>\n
    • \u63d0\u9ad8\u5e76\u53d1\u6027\uff1a<\/strong>\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u5e76\u53d1\u67e5\u8be2\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f7f\u591a\u4e2a\u67e5\u8be2\u53ef\u4ee5\u5e76\u884c\u8bbf\u95ee\u6570\u636e\u3002<\/li>\n<\/ul>\n

      \u4f55\u65f6\u6dfb\u52a0\u7d22\u5f15<\/strong><\/p>\n

      \u5e76\u975e\u6240\u6709\u67e5\u8be2\u90fd\u9700\u8981\u7d22\u5f15\u3002\u8003\u8651\u6dfb\u52a0\u7d22\u5f15\u7684\u6700\u4f73\u65f6\u673a\u5305\u62ec\uff1a<\/p>\n

        \n
      • \u67e5\u8be2\u7ecf\u5e38\u4f7f\u7528\u7279\u5b9a\u7684\u5217\u8fdb\u884c\u8fc7\u6ee4\u3002<\/li>\n
      • \u67e5\u8be2\u8fd4\u56de\u5927\u91cf\u6570\u636e\u5e76\u9700\u8981\u6392\u5e8f\u6216\u5206\u7ec4\u3002<\/li>\n
      • \u67e5\u8be2\u6d89\u53ca\u591a\u4e2a\u8868\u5e76\u9700\u8981\u8fde\u63a5\u3002<\/li>\n
      • \u6570\u636e\u5e93\u8868\u5f88\u5927\uff0c\u9700\u8981\u4f18\u5316\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n

        \u4ee5\u4e0a\u5c31\u662fsql\u67e5\u8be2\u600e\u4e48\u52a0\u7d22\u5f15\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":"

        \u7d22\u5f15\u662f\u4e00\u79cd\u901a\u8fc7\u6392\u5e8f\u6570\u636e\u5217\u6765\u52a0\u901f\u6570\u636e\u67e5\u627e\u7684\u6570\u636e\u7ed3\u6784\u3002\u4e3a sql \u67e5\u8be2\u6dfb\u52a0\u7d22\u5f15\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u786e\u5b9a\u9700\u8981\u7d22\u5f15\u7684\u5217\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\uff08b \u6811\u3001\u54c8\u5e0c\u6216\u4f4d\u56fe\uff09\u3002\u4f7f\u7528 create index \u547d\u4ee4\u521b\u5efa\u7d22\u5f15\u3002\u5b9a\u671f\u91cd\u5efa\u6216\u91cd\u65b0\u7ec4\u7ec7\u7d22\u5f15\u4ee5\u7ef4\u62a4\u5176\u6548\u7387\u3002\u6dfb\u52a0\u7d22\u5f15\u7684\u597d\u5904\u5305\u62ec\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3001\u51cf\u5c11 i\/o \u64cd\u4f5c\u3001\u4f18\u5316\u6392\u5e8f\u548c\u7b5b\u9009\u4ee5\u53ca\u63d0\u9ad8\u5e76\u53d1\u6027\u3002\u5f53\u67e5\u8be2\u7ecf\u5e38\u4f7f\u7528\u7279\u5b9a\u5217\u3001\u8fd4\u56de\u5927\u91cf\u6570\u636e\u9700\u8981\u6392\u5e8f\u6216\u5206\u7ec4\u3001\u6d89\u53ca\u591a\u4e2a\u8868\u6216\u6570\u636e\u5e93\u8868\u8f83\u5927\u65f6\uff0c\u5e94\u8be5\u8003\u8651\u6dfb\u52a0\u7d22\u5f15\u3002 \u5982\u4f55\u4e3a SQL \u67e5\u8be2\u6dfb\u52a0\u7d22\u5f15 \u4ec0\u4e48\u662f\u7d22\u5f15 \u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u8bb0\u5f55\u3002\u5b83\u901a\u8fc7\u5c06\u6570\u636e\u5217\u53ca\u5176\u5bf9\u5e94\u503c\u6392\u5e8f\u548c\u5b58\u50a8\uff0c\u4ee5\u4fbf\u6570\u636e\u5e93\u53ef\u4ee5\u66f4\u5feb\u5730\u8bbf\u95ee\u5b83\u4eec\uff0c\u4ece\u800c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002 \u5982\u4f55\u6dfb\u52a0\u7d22\u5f15 \u8981\u5728 SQL \u67e5\u8be2\u4e2d\u6dfb\u52a0\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u786e\u5b9a\u9700\u8981\u7d22\u5f15\u7684\u5217\uff1a\u9009\u62e9\u5728\u67e5\u8be2\u4e2d\u7ecf\u5e38\u4f7f\u7528\u7684\u5217\u6216\u7ecf\u5e38\u8fdb\u884c\u6392\u5e8f\u6216\u7b5b\u9009\u7684\u5217\u3002 \u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1a\u6709\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec B \u6811\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u4f4d\u56fe\u7d22\u5f15\u3002\u9009\u62e9\u6700\u9002\u5408\u67e5\u8be2\u9700\u6c42\u7684\u7c7b\u578b\u3002 \u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528 SQL \u547d\u4ee4 CREATE INDEX \u521b\u5efa\u7d22\u5f15\u3002\u8be5\u547d\u4ee4\u5c06\u6307\u5b9a\u7d22\u5f15\u540d\u79f0\u3001\u5217\u540d\u79f0\u548c\u7d22\u5f15\u7c7b\u578b\u3002 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