{"id":52848,"date":"2024-12-03T15:22:31","date_gmt":"2024-12-03T07:22:31","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52848\/"},"modified":"2024-12-03T15:22:31","modified_gmt":"2024-12-03T07:22:31","slug":"oracle-sql-%e4%b8%ad%e7%9a%84%e8%a7%a3%e6%9e%90-%e7%a1%ac%e8%a7%a3%e6%9e%90%e8%bd%af%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52848\/","title":{"rendered":"Oracle SQL \u4e2d\u7684\u89e3\u6790 |\u786c\u89e3\u6790|\u8f6f\u89e3\u6790"},"content":{"rendered":"

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

Oracle SQL \u4e2d\u7684\u89e3\u6790 |\u786c\u89e3\u6790|\u8f6f\u89e3\u6790<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aOracle SQL \u4e2d\u7684\u89e3\u6790 |\u786c\u89e3\u6790|\u8f6f\u89e3\u6790\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\"Oracle<\/p>\n

\u4e00\u822c\u6765\u8bf4\uff0c\u5728 Oracle SQL \u548c\u6570\u636e\u5e93\u4e2d\uff0c\u89e3\u6790\u662f\u5206\u89e3\u548c\u5206\u6790 SQL \u8bed\u53e5\u4ee5\u786e\u4fdd\u5b83\u4eec\u5728\u6267\u884c\u4e4b\u524d\u5728\u8bed\u6cd5\u548c\u8bed\u4e49\u4e0a\u6b63\u786e\u7684\u8fc7\u7a0b\u3002 Oracle SQL \u4e2d\u6709\u4e24\u79cd\u4e3b\u8981\u7684\u89e3\u6790\u7c7b\u578b\uff1a\u786c\u89e3\u6790\u548c\u8f6f\u89e3\u6790\u3002\u8fd9\u4e9b\u51b3\u5b9a\u4e86\u6570\u636e\u5e93\u5904\u7406\u67e5\u8be2\u9700\u8981\u505a\u591a\u5c11\u5de5\u4f5c\u3002<\/p>\n

    \n
  1. \u786c\u89e3\u6790<\/li>\n<\/ol>\n

    \u5b9a\u4e49\uff1a\u5f53\u6570\u636e\u5e93\u5fc5\u987b\u4ece\u5934\u5f00\u59cb\u5b8c\u5168\u89e3\u6790 SQL \u67e5\u8be2\u65f6\uff0c\u5c31\u4f1a\u53d1\u751f\u786c\u89e3\u6790\uff0c\u5c31\u50cf\u7b2c\u4e00\u6b21\u770b\u5230\u5b83\u4e00\u6837\u3002<\/p>\n

    \u7279\u70b9\uff1a<\/p>\n

    \u5728\u5171\u4eab\u6c60\uff08\u6570\u636e\u5e93\u5185\u5b58\u4e2d\u7f13\u5b58\u6267\u884c\u8ba1\u5212\u7684\u4e00\u90e8\u5206\uff09\u4e2d\u627e\u4e0d\u5230\u8be5SQL\u8bed\u53e5\u3002<\/p>\n

    \u6570\u636e\u5e93\u5fc5\u987b\u7ecf\u5386\u5b8c\u6574\u7684\u7f16\u8bd1\u8fc7\u7a0b\uff1a\u89e3\u6790\u3001\u7ed1\u5b9a\u3001\u4f18\u5316\u3001\u4ee3\u7801\u751f\u6210\u548c\u6267\u884c\u8ba1\u5212\u521b\u5efa\u3002<\/p>\n

    \u786c\u89e3\u6790\u662f\u8d44\u6e90\u5bc6\u96c6\u578b\u7684\uff0c\u5e76\u4e14\u4f1a\u56e0 CPU \u5f00\u9500\u3001\u5171\u4eab\u8d44\u6e90\u4e89\u7528\u548c\u9501\u5b9a\u800c\u964d\u4f4e\u6027\u80fd\u3002<\/p>\n

    \u5f53\u5b83\u53d1\u751f\u65f6\uff1a<\/p>\n

    \u9996\u6b21\u53d1\u51fa\u65b0\u7684\u3001\u72ec\u7279\u7684 SQL \u8bed\u53e5\u3002<\/p>\n

    SQL \u7ed3\u6784\u7684\u66f4\u6539\uff08\u4f8b\u5982\uff0c\u4e0d\u540c\u7684\u6587\u5b57\u6216\u67e5\u8be2\u672c\u8eab\u7684\u66f4\u6539\uff09\u3002<\/p>\n

    \u5171\u4eab\u6c60\u88ab\u5237\u65b0\u6216\u6e05\u9664\uff0c\u5e76\u4e14\u7f13\u5b58\u7684\u67e5\u8be2\u88ab\u5220\u9664\u3002<\/p>\n

    \u6b63\u5728\u67e5\u8be2\u7684\u6570\u636e\u5b58\u5728\u663e\u7740\u5dee\u5f02\uff08\u4f8b\u5982\u57fa\u6570\u66f4\u6539\uff09\uff0c\u8feb\u4f7f\u521b\u5efa\u65b0\u7684\u6267\u884c\u8ba1\u5212\u3002<\/p>\n

    \u542b\u4e49\uff1a\u786c\u89e3\u6790\u4f1a\u6d88\u8017\u66f4\u591a\u7684\u65f6\u95f4\u548c\u8d44\u6e90\uff0c\u56e0\u6b64\u6700\u5c0f\u5316\u786c\u89e3\u6790\u662f\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u7684\u5173\u952e\u3002<\/p>\n

    \u793a\u4f8b\uff1a<\/p>\n

    \u4ece\u5458\u5de5\u4e2d\u9009\u62e9 * WHERE employee_id = 101;<\/p>\n

    \u5982\u679c\u7b2c\u4e00\u6b21\u53d1\u51fa\u6b64\u67e5\u8be2\u5e76\u4e14\u5728\u7f13\u5b58\u4e2d\u6ca1\u6709\u627e\u5230\u6267\u884c\u8ba1\u5212\uff0c\u5219\u4f1a\u53d1\u751f\u786c\u89e3\u6790\u3002<\/p>\n

      \n
    1. \u8f6f\u89e3\u6790<\/li>\n<\/ol>\n

      \u5b9a\u4e49\uff1a\u5f53 Oracle \u53ef\u4ee5\u5c06\u5e93\u7f13\u5b58\u4e2d\u7684\u73b0\u6709\u6267\u884c\u8ba1\u5212\u91cd\u7528\u4e8e\u4e4b\u524d\u5df2\u7ecf\u89e3\u6790\u548c\u4f18\u5316\u7684 SQL \u8bed\u53e5\u65f6\uff0c\u5c31\u4f1a\u53d1\u751f\u8f6f\u89e3\u6790\u3002<\/p>\n

      \u7279\u70b9\uff1a<\/p>\n

      Oracle \u5728\u5171\u4eab\u6c60\u4e2d\u627e\u5230 SQL \u8bed\u53e5\u5e76\u8df3\u8fc7\u5927\u90e8\u5206\u7f16\u8bd1\u8fc7\u7a0b\uff08\u4f8b\u5982\u89e3\u6790\u3001\u4f18\u5316\uff09\u3002<\/p>\n

      \u4ec5\u6267\u884c\u8f83\u5c0f\u7684\u68c0\u67e5\uff0c\u4f8b\u5982\u9a8c\u8bc1\u5bf9\u8c61\u6743\u9650\u5e76\u786e\u4fdd\u4e4b\u524d\u7f13\u5b58\u7684\u6267\u884c\u8ba1\u5212\u4ecd\u7136\u6709\u6548\u3002<\/p>\n

      \u4e0e\u786c\u89e3\u6790\u76f8\u6bd4\uff0c\u8f6f\u89e3\u6790\u66f4\u5feb\u3001\u66f4\u9ad8\u6548\uff0c\u56e0\u4e3a\u5b83\u91cd\u7528\u4e86\u5df2\u7f16\u8bd1\u7684\u6267\u884c\u8ba1\u5212\u3002<\/p>\n

      \u5f53\u5b83\u53d1\u751f\u65f6\uff1a<\/p>\n

      \u5b8c\u5168\u76f8\u540c\u7684 SQL \u8bed\u53e5\u88ab\u6267\u884c\u591a\u6b21\uff08\u65e0\u8bba\u6709\u6216\u6ca1\u6709\u7ed1\u5b9a\u53d8\u91cf\uff09\u3002<\/p>\n

      \u5728\u5171\u4eab\u6c60\u4e2d\u627e\u5230 SQL \u67e5\u8be2\u3002<\/p>\n

      \u542b\u4e49\uff1a\u8f6f\u89e3\u6790\u51cf\u5c11\u4e86\u6267\u884c\u9891\u7e41\u91cd\u590d\u67e5\u8be2\u7684\u5f00\u9500\u5e76\u63d0\u9ad8\u4e86\u6027\u80fd\u3002<\/p>\n

      \u793a\u4f8b\uff1a<\/p>\n

      \u4ece\u5458\u5de5\u4e2d\u9009\u62e9 * WHERE employee_id = 101;<\/p>\n

      \u5982\u679c\u6700\u8fd1\u53d1\u51fa\u6b64\u67e5\u8be2\u5e76\u4e14\u6267\u884c\u8ba1\u5212\u4ecd\u7136\u7f13\u5b58\uff0cOracle \u4f1a\u91cd\u7528\u8be5\u8ba1\u5212\u5e76\u6267\u884c\u8f6f\u89e3\u6790\u3002<\/p>\n

        \n
      1. \u6e38\u6807\u5171\u4eab\u548c\u7ed1\u5b9a\u53d8\u91cf<\/li>\n<\/ol>\n

        \u8f6f\u89e3\u6790\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d7\u7ed1\u5b9a\u53d8\u91cf\u7684\u4f7f\u7528\u548cOracle\u6e38\u6807\u5171\u4eab\u673a\u5236\u7684\u5f71\u54cd\uff1a<\/p>\n

        \u7ed1\u5b9a\u53d8\u91cf\uff1a\u5982\u679c\u4f7f\u7528\u7ed1\u5b9a\u53d8\u91cf\uff08\u4f8b\u5982\uff0c:employee_id \u800c\u4e0d\u662f 101 \u7b49\u786c\u7f16\u7801\u503c\uff09\uff0cOracle \u66f4\u6709\u53ef\u80fd\u91cd\u7528\u76f8\u540c\u7684\u6267\u884c\u8ba1\u5212\uff0c\u4ece\u800c\u5bfc\u81f4\u8f6f\u89e3\u6790\u3002<\/p>\n

        \u793a\u4f8b\uff1a<\/p>\n

        \u4ece\u5458\u5de5\u4e2d\u9009\u62e9 * WHERE employee_id = :employee_id;<\/p>\n

        \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c:employee_id \u7684\u503c\u53ef\u4ee5\u6539\u53d8\uff0c\u4f46\u6267\u884c\u8ba1\u5212\u4ecd\u7136\u53ef\u4ee5\u91cd\u7528\u3002<\/p>\n

        \u6e38\u6807\u5171\u4eab\uff1aOracle\u4f7f\u7528\u6e38\u6807\u6765\u7ba1\u7406SQL\u8bed\u53e5\u548c\u6267\u884c\u8ba1\u5212\u3002\u5982\u679c\u542f\u7528\u6e38\u6807\u5171\u4eab\uff0cOracle \u53ef\u4ee5\u91cd\u7528\u73b0\u6709\u6e38\u6807\u8fdb\u884c\u7c7b\u4f3c\u67e5\u8be2\uff0c\u4ece\u800c\u51cf\u5c11\u786c\u89e3\u6790\u7684\u9700\u8981\u3002<\/p>\n

        \u8f6f\u89e3\u6790\u7684\u597d\u5904\uff1a<\/p>\n

        \u63d0\u9ad8\u6027\u80fd\uff1a\u8f6f\u89e3\u6790\u907f\u514d\u4e86\u4e0e\u786c\u89e3\u6790\u76f8\u5173\u7684 CPU \u548c\u5185\u5b58\u5f00\u9500\u3002<\/p>\n

        \u51cf\u5c11\u8d44\u6e90\u4e89\u7528\uff1a\u7531\u4e8e\u8f6f\u89e3\u6790\u4e0d\u9700\u8981\u786c\u89e3\u6790\u6240\u9700\u7684\u5927\u91cf\u8d44\u6e90\uff0c\u56e0\u6b64\u53ef\u4ee5\u51cf\u5c11\u5bf9\u5171\u4eab\u8d44\u6e90\uff08\u4f8b\u5982\u95e9\u9501\u548c\u9501\uff09\u7684\u4e89\u7528\u3002<\/p>\n

        \u53ef\u6269\u5c55\u6027\uff1a\u8f6f\u89e3\u6790\u6709\u52a9\u4e8e\u91cd\u590d\u6267\u884c\u76f8\u540c SQL \u67e5\u8be2\u7684\u7cfb\u7edf\uff0c\u5141\u8bb8\u7cfb\u7edf\u901a\u8fc7\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5f00\u9500\u6765\u6269\u5c55\u3002<\/p>\n

        \u786c\u89e3\u6790\u7684\u6311\u6218\uff1a<\/p>\n

        \u6027\u80fd\u74f6\u9888\uff1a\u9891\u7e41\u7684\u786c\u89e3\u6790\u4f1a\u5bfc\u81f4CPU\u74f6\u9888\u5e76\u964d\u4f4e\u6574\u4f53\u6027\u80fd\u3002<\/p>\n

        \u5171\u4eab\u6c60\u4e89\u7528\uff1a\u591a\u4e2a\u4f1a\u8bdd\u6267\u884c\u786c\u89e3\u6790\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5171\u4eab\u6c60\u4e2d\u7684\u8d44\u6e90\u4e89\u7528\uff0c\u4ece\u800c\u5bfc\u81f4\u6570\u636e\u5e93\u6027\u80fd\u4e0d\u4f73\u3002<\/p>\n

          \n
        1. \u5e93\u7f13\u5b58\u672a\u547d\u4e2d\u548c\u547d\u4e2d<\/li>\n<\/ol>\n

          Library Cache Hit\uff1a\u5982\u679cOracle\u5728\u89e3\u6790\u65f6\u5728library cache\u4e2d\u53d1\u73b0\u4e86\u6267\u884c\u8ba1\u5212\uff0c\u5219\u79f0\u4e3alibrary cache hit\uff0c\u4ece\u800c\u5bfc\u81f4\u8f6f\u89e3\u6790\u3002<\/p>\n

          Library Cache Miss\uff1a\u5982\u679cOracle\u5728\u5e93\u7f13\u5b58\u4e2d\u627e\u4e0d\u5230\u6267\u884c\u8ba1\u5212\uff0c\u5c31\u4f1a\u5bfc\u81f4\u786c\u89e3\u6790\uff0c\u6bd4\u8f83\u8017\u8d39\u8d44\u6e90\u3002<\/p>\n

          \u786c\u89e3\u6790\u548c\u8f6f\u89e3\u6790\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\uff1a<\/p>\n

          \u7ed3\u8bba\uff1a<\/p>\n

          \u786c\u89e3\u6790\u6210\u672c\u9ad8\u6602\uff0c\u5e94\u901a\u8fc7\u4f7f\u7528\u7ed1\u5b9a\u53d8\u91cf\u548c\u786e\u4fdd\u6570\u636e\u5e93\u6b63\u786e\u914d\u7f6e\u6e38\u6807\u5171\u4eab\u7b49\u6700\u4f73\u5b9e\u8df5\u6765\u6700\u5927\u7a0b\u5ea6\u5730\u51cf\u5c11\u3002<\/p>\n

          \u8f6f\u89e3\u6790\u6548\u7387\u66f4\u9ad8\uff0c\u5e76\u4e14\u91cd\u7528\u6267\u884c\u8ba1\u5212\uff0c\u6709\u52a9\u4e8e\u51cf\u5c11\u91cd\u590d SQL \u67e5\u8be2\u7684\u5f00\u9500\u3002<\/p>\n

          \u901a\u8fc7\u7406\u89e3\u548c\u7ba1\u7406\u89e3\u6790\u7c7b\u578b\uff0c\u6570\u636e\u5e93\u7ba1\u7406\u5458\u548c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u63d0\u9ad8 Oracle \u6570\u636e\u5e93\u7684\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n

          \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n

          \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664 <\/p>\n

          \n
          <\/dt>\n
          \n TCL\u534e\u661f\u5f15\u9886\u5370\u5237OLED\u8d70\u5411\u5546\u4e1a\u5316 \u6d1e\u89c1\u6781\u81f4APEX\u5e94\u8fd0\u800c\u751f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"

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