{"id":199983,"date":"2025-05-06T11:42:40","date_gmt":"2025-05-06T03:42:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199983\/"},"modified":"2025-05-06T11:42:40","modified_gmt":"2025-05-06T03:42:40","slug":"%e8%af%a6%e8%a7%a3oracle%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e7%9a%84%e5%90%84%e7%a7%8d%e7%b1%bb%e5%9e%8b%e7%9a%84%e7%b4%a2%e5%bc%95%e5%8f%8a%e5%85%b6%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199983\/","title":{"rendered":"\u8be6\u89e3Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5404\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\u53ca\u5176\u4f5c\u7528"},"content":{"rendered":"

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

\u8be6\u89e3Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5404\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\u53ca\u5176\u4f5c\u7528<\/h1>\n<\/p>\n

Oracle\u6570\u636e\u5e93\u4e2d\u7684\u7d22\u5f15\u7c7b\u578b\u53ca\u4f5c\u7528\u8be6\u89e3<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u79cd\u975e\u5e38\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5feb\u901f\u5b9a\u4f4d\u548c\u68c0\u7d22\u6570\u636e\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002\u7d22\u5f15\u53ef\u4ee5\u5927\u5927\u51cf\u5c11\u67e5\u8be2\u6570\u636e\u65f6\u9700\u8981\u626b\u63cf\u7684\u8868\u7684\u884c\u6570\uff0c\u4ece\u800c\u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdOracle\u6570\u636e\u5e93\u4e2d\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\u53ca\u5176\u4f5c\u7528\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. B-Tree\u7d22\u5f15<\/li>\n<\/ol>\n

    B-Tree\u7d22\u5f15\u662fOracle\u6570\u636e\u5e93\u4e2d\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\u4e4b\u4e00\u3002\u5b83\u5c06\u6570\u636e\u5b58\u50a8\u5728\u6811\u7ed3\u6784\u4e2d\uff0c\u6bcf\u4e2a\u8282\u70b9\u5305\u542b\u591a\u4e2a\u5b50\u8282\u70b9\uff0c\u4ece\u800c\u5f62\u6210\u4e86\u4e00\u4e2a\u6709\u5e8f\u7684\u5c42\u7ea7\u7ed3\u6784\u3002B-Tree\u7d22\u5f15\u9002\u7528\u4e8e\u7b49\u503c\u67e5\u8be2\u548c\u8303\u56f4\u67e5\u8be2\uff0c\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u9700\u8981\u7684\u6570\u636e\u3002<\/p>\n

    \u521b\u5efa\u4e00\u4e2aB-Tree\u7d22\u5f15\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

    CREATE INDEX idx_name ON employees (last_name);<\/pre>\n
      \n
    1. \u552f\u4e00\u7d22\u5f15<\/li>\n<\/ol>\n
      \u552f\u4e00\u7d22\u5f15\u662f\u4e00\u79cd\u9650\u5236\u7d22\u5f15\u5217\u4e2d\u7684\u6570\u503c\u4e0d\u80fd\u91cd\u590d\u7684\u7d22\u5f15\u3002\u552f\u4e00\u7d22\u5f15\u901a\u5e38\u7528\u4e8e\u4fdd\u8bc1\u6570\u636e\u8868\u4e2d\u67d0\u5217\u7684\u552f\u4e00\u6027\u7ea6\u675f\u3002\u5982\u679c\u8bd5\u56fe\u63d2\u5165\u4e00\u4e2a\u91cd\u590d\u7684\u7d22\u5f15\u503c\uff0cOracle\u4f1a\u62a5\u9519\u3002<\/p>\n
      \u521b\u5efa\u4e00\u4e2a\u552f\u4e00\u7d22\u5f15\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
      CREATE UNIQUE INDEX idx_email ON employees (email);<\/pre>\n
        \n
      1. \u805a\u7c07\u7d22\u5f15<\/li>\n<\/ol>\n
        \u805a\u7c07\u7d22\u5f15\u662f\u5c06\u8868\u7684\u6570\u636e\u884c\u5b58\u50a8\u4e0e\u7d22\u5f15\u5206\u7ec4\u5728\u4e00\u8d77\u7684\u4e00\u79cd\u7d22\u5f15\u7c7b\u578b\u3002\u5728\u805a\u7c07\u7d22\u5f15\u4e2d\uff0c\u6570\u636e\u884c\u6309\u7167\u7d22\u5f15\u7684\u987a\u5e8f\u5b58\u50a8\uff0c\u51cf\u5c11\u4e86\u78c1\u76d8I\/O\u7684\u6b21\u6570\uff0c\u63d0\u9ad8\u4e86\u68c0\u7d22\u901f\u5ea6\u3002<\/p>\n
        \u521b\u5efa\u4e00\u4e2a\u805a\u7c07\u7d22\u5f15\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
        CREATE CLUSTER idx_dept ON employees (department_id);<\/pre>\n
          \n
        1. \u5168\u6587\u7d22\u5f15<\/li>\n<\/ol>\n
          \u5168\u6587\u7d22\u5f15\u662f\u9488\u5bf9\u6587\u672c\u7c7b\u578b\u5b57\u6bb5\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u7528\u4e8e\u6a21\u7cca\u67e5\u8be2\u548c\u5168\u6587\u641c\u7d22\u3002\u5168\u6587\u7d22\u5f15\u901a\u5e38\u9700\u8981\u4f7f\u7528\u7279\u5b9a\u7684\u5168\u6587\u641c\u7d22\u5f15\u64ce\u6765\u652f\u6301\u3002<\/p>\n
          \u521b\u5efa\u4e00\u4e2a\u5168\u6587\u7d22\u5f15\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          CREATE INDEX idx_description ON products (description) INDEXTYPE IS CTXSYS.CONTEXT;<\/pre>\n
          \u603b\u7ed3<\/p>\n
          \u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u626e\u6f14\u7740\u975e\u5e38\u91cd\u8981\u7684\u89d2\u8272\uff0c\u80fd\u591f\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u52a0\u5feb\u6570\u636e\u68c0\u7d22\u901f\u5ea6\u3002\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u573a\u666f\uff0c\u5f00\u53d1\u4eba\u5458\u9700\u8981\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u3002\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u5e0c\u671b\u8bfb\u8005\u80fd\u66f4\u597d\u5730\u7406\u89e3Oracle\u6570\u636e\u5e93\u4e2d\u7684\u7d22\u5f15\u7c7b\u578b\u53ca\u5176\u4f5c\u7528\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\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n
          \n
          \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          \u8be6\u89e3Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5404\u79cd\u7c7b...<\/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-199983","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199983","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=199983"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199983\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}