{"id":199858,"date":"2025-05-06T10:20:31","date_gmt":"2025-05-06T02:20:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199858\/"},"modified":"2025-05-06T10:20:31","modified_gmt":"2025-05-06T02:20:31","slug":"%e6%8f%ad%e7%a7%98oracle%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%ef%bc%9a%e4%bd%a0%e4%b8%8d%e5%8f%af%e5%bf%bd%e8%a7%86%e7%9a%84%e8%a6%81%e7%82%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199858\/","title":{"rendered":"\u63ed\u79d8Oracle\u6570\u636e\u7c7b\u578b\uff1a\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u8981\u70b9"},"content":{"rendered":"

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

\u63ed\u79d8Oracle\u6570\u636e\u7c7b\u578b\uff1a\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u8981\u70b9<\/h1>\n

\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6574\u7406\u5206\u4eab\u300a\u63ed\u79d8Oracle\u6570\u636e\u7c7b\u578b\uff1a\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u8981\u70b9\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6570\u636e\u5e93\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u4e3b\u673a\u5b9d\u8d1d\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n

Oracle\u6570\u636e\u7c7b\u578b\u5927\u63ed\u79d8\uff1a\u4f60\u5fc5\u987b\u4e86\u89e3\u7684\u77e5\u8bc6\u70b9\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

Oracle\u4f5c\u4e3a\u4e16\u754c\u9886\u5148\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u4e4b\u4e00\uff0c\u5728\u6570\u636e\u5b58\u50a8\u548c\u5904\u7406\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\u3002\u5728Oracle\u4e2d\uff0c\u6570\u636e\u7c7b\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u5b9a\u4e49\u4e86\u6570\u636e\u5728\u6570\u636e\u5e93\u4e2d\u7684\u5b58\u50a8\u683c\u5f0f\u3001\u8303\u56f4\u548c\u64cd\u4f5c\u65b9\u5f0f\u3002\u672c\u6587\u5c06\u63ed\u793aOracle\u6570\u636e\u7c7b\u578b\u7684\u5404\u79cd\u77e5\u8bc6\u70b9\uff0c\u5e76\u4e14\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u5c55\u793a\u5b83\u4eec\u7684\u7528\u6cd5\u548c\u7279\u70b9\u3002<\/p>\n

\u4e00\u3001\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b<\/p>\n

    \n
  1. \u5b57\u7b26\u578b\u6570\u636e\u7c7b\u578b\uff08CHAR\u3001VARCHAR2\u3001CLOB\uff09<\/li>\n<\/ol>\n

    \u5b57\u7b26\u578b\u6570\u636e\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u6587\u672c\u6570\u636e\uff0c\u5176\u4e2dCHAR\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\uff0cVARCHAR2\u662f\u53ef\u53d8\u957f\u5ea6\u7684\uff0c\u800cCLOB\u7528\u4e8e\u5b58\u50a8\u5927\u6bb5\u6587\u672c\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

    CREATE TABLE employees (\n    employee_id NUMBER,\n    first_name VARCHAR2(50),\n    last_name VARCHAR2(50),\n    bio CLOB\n);<\/pre>\n
      \n
    1. \u6570\u503c\u578b\u6570\u636e\u7c7b\u578b\uff08NUMBER\u3001FLOAT\u3001INTEGER\uff09<\/li>\n<\/ol>\n
      \u6570\u503c\u578b\u6570\u636e\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u6570\u5b57\u6570\u636e\uff0c\u5176\u4e2dNUMBER\u53ef\u4ee5\u5b58\u50a8\u4efb\u610f\u7cbe\u5ea6\u7684\u6570\u5b57\uff0cFLOAT\u7528\u4e8e\u5b58\u50a8\u6d6e\u70b9\u6570\uff0cINTEGER\u7528\u4e8e\u5b58\u50a8\u6574\u6570\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
      CREATE TABLE products (\n    product_id NUMBER,\n    price FLOAT,\n    quantity INTEGER\n);<\/pre>\n
        \n
      1. \u65e5\u671f\u578b\u6570\u636e\u7c7b\u578b\uff08DATE\u3001TIMESTAMP\uff09<\/li>\n<\/ol>\n
        \u65e5\u671f\u578b\u6570\u636e\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u4fe1\u606f\uff0c\u5176\u4e2dDATE\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\uff0cTIMESTAMP\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
        CREATE TABLE orders (\n    order_id NUMBER,\n    order_date DATE,\n    delivery_time TIMESTAMP\n);<\/pre>\n
        \u4e8c\u3001\u7279\u6b8a\u7684\u6570\u636e\u7c7b\u578b<\/p>\n
          \n
        1. RAW\u7c7b\u578b<\/li>\n<\/ol>\n
          RAW\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u539f\u59cb\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u56fe\u50cf\u3001\u97f3\u9891\u7b49\u591a\u5a92\u4f53\u6570\u636e\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          CREATE TABLE images (\n    image_id NUMBER,\n    image_data RAW(1000000)\n);<\/pre>\n
            \n
          1. BLOB\u7c7b\u578b<\/li>\n<\/ol>\n
            BLOB\u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u5927\u578b\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u5927\u6587\u4ef6\u6216\u4e8c\u8fdb\u5236\u5bf9\u8c61\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            CREATE TABLE documents (\n    document_id NUMBER,\n    document_content BLOB\n);<\/pre>\n
            \u4e09\u3001\u6570\u636e\u7c7b\u578b\u8f6c\u6362<\/p>\n
            \u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528CAST\u51fd\u6570\u8fdb\u884c\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff0c\u5c06\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u6210\u53e6\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            SELECT CAST('123' AS NUMBER) AS num_value\nFROM dual;<\/pre>\n
            \u56db\u3001\u81ea\u5b9a\u4e49\u6570\u636e\u7c7b\u578b<\/p>\n
            \u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528CREATE TYPE\u8bed\u53e5\u521b\u5efa\u81ea\u5b9a\u4e49\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5b58\u50a8\u7279\u5b9a\u7684\u6570\u636e\u7ed3\u6784\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            CREATE TYPE address_type AS OBJECT (\n    street VARCHAR2(50),\n    city VARCHAR2(50),\n    state VARCHAR2(2)\n);\n\nCREATE TABLE customers (\n    customer_id NUMBER,\n    customer_address address_type\n);<\/pre>\n
            \u603b\u7ed3\uff1a<\/p>\n
            \u672c\u6587\u4ecb\u7ecd\u4e86Oracle\u4e2d\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u3001\u7279\u6b8a\u7684\u6570\u636e\u7c7b\u578b\u3001\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4ee5\u53ca\u81ea\u5b9a\u4e49\u6570\u636e\u7c7b\u578b\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e76\u901a\u8fc7\u4ee3\u7801\u793a\u4f8b\u5c55\u793a\u4e86\u5b83\u4eec\u7684\u7528\u6cd5\u548c\u7279\u70b9\u3002\u6df1\u5165\u7406\u89e3Oracle\u6570\u636e\u7c7b\u578b\u5bf9\u4e8e\u6570\u636e\u5e93\u8bbe\u8ba1\u548c\u5f00\u53d1\u5177\u6709\u91cd\u8981\u610f\u4e49\uff0c\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u4e86\u89e3\u548c\u5e94\u7528Oracle\u6570\u636e\u7c7b\u578b\u3002<\/p>\n
            \u4eca\u5929\u5173\u4e8e\u300a\u63ed\u79d8Oracle\u6570\u636e\u7c7b\u578b\uff1a\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u8981\u70b9\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n
            \n
            \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
            \u63ed\u79d8Oracle\u6570\u636e\u7c7b\u578b\uff1a\u4f60\u4e0d\u53ef...<\/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-199858","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199858","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=199858"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199858\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}