{"id":199946,"date":"2025-05-06T11:33:29","date_gmt":"2025-05-06T03:33:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199946\/"},"modified":"2025-05-06T11:33:29","modified_gmt":"2025-05-06T03:33:29","slug":"%e6%af%94%e8%be%83%e5%88%86%e6%9e%90oracle%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%adblob%e5%92%8cclob%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e7%9a%84%e5%bc%82%e5%90%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199946\/","title":{"rendered":"\u6bd4\u8f83\u5206\u6790Oracle\u6570\u636e\u5e93\u4e2dBlob\u548cClob\u6570\u636e\u7c7b\u578b\u7684\u5f02\u540c"},"content":{"rendered":"

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

\u6bd4\u8f83\u5206\u6790Oracle\u6570\u636e\u5e93\u4e2dBlob\u548cClob\u6570\u636e\u7c7b\u578b\u7684\u5f02\u540c<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6570\u636e\u5e93\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300a\u6bd4\u8f83\u5206\u6790Oracle\u6570\u636e\u5e93\u4e2dBlob\u548cClob\u6570\u636e\u7c7b\u578b\u7684\u5f02\u540c\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

Blob\u548cClob\u662fOracle\u6570\u636e\u5e93\u4e2d\u4e24\u79cd\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5b58\u50a8\u5927\u91cf\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u548c\u5b57\u7b26\u6570\u636e\u3002\u672c\u6587\u5c06\u5206\u6790Blob\u548cClob\u6570\u636e\u7c7b\u578b\u7684\u5dee\u5f02\uff0c\u5e76\u4ece\u5404\u81ea\u7684\u4f18\u52bf\u548c\u52a3\u52bf\u8fdb\u884c\u6bd4\u8f83\u3002<\/p>\n

\u4e00\u3001Blob\u6570\u636e\u7c7b\u578b<\/p>\n

Blob\u662fBinary Large Object\u7684\u7f29\u5199\uff0c\u7528\u4e8e\u5b58\u50a8\u5927\u91cf\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u3002Blob\u7c7b\u578b\u5728Oracle\u6570\u636e\u5e93\u4e2d\u53ef\u4ee5\u5b58\u50a8\u6700\u591a4GB\u5927\u5c0f\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n

Blob\u7684\u4f18\u52bf\uff1a<\/p>\n

    \n
  1. \u9002\u7528\u4e8e\u5b58\u50a8\u5927\u578b\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\uff1b<\/li>\n
  2. \u652f\u6301\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u8bfb\u5199\u64cd\u4f5c\uff1b<\/li>\n
  3. \u5b58\u50a8\u548c\u8bfb\u53d6\u6548\u7387\u9ad8\u3002<\/li>\n<\/ol>\n

    Blob\u7684\u52a3\u52bf\uff1a<\/p>\n

      \n
    1. \u4e0d\u652f\u6301\u5bf9\u4e8c\u8fdb\u5236\u6570\u636e\u8fdb\u884c\u6587\u672c\u5904\u7406\uff0c\u9700\u8981\u5355\u72ec\u7684\u5904\u7406\u65b9\u5f0f\uff1b<\/li>\n
    2. \u5728\u8fdb\u884c\u5b57\u7b26\u4e32\u64cd\u4f5c\u65f6\u6548\u7387\u76f8\u5bf9\u8f83\u4f4e\uff1b<\/li>\n
    3. \u65e0\u6cd5\u76f4\u63a5\u8fdb\u884c\u6587\u672c\u641c\u7d22\u3002<\/li>\n<\/ol>\n

      \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684Blob\u6570\u636e\u7c7b\u578b\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

      -- \u521b\u5efa\u5305\u542bBlob\u6570\u636e\u7c7b\u578b\u7684\u8868\nCREATE TABLE images (\n    id NUMBER PRIMARY KEY,\n    image_data BLOB\n);\n\n-- \u63d2\u5165Blob\u6570\u636e\nINSERT INTO images (id, image_data)\nVALUES (1, empty_blob());\n\n-- \u5199\u5165Blob\u6570\u636e\nUPDATE images\nSET image_data = empty_blob()\nWHERE id = 1;<\/pre>\n
      \u4e8c\u3001Clob\u6570\u636e\u7c7b\u578b<\/p>\n
      Clob\u662fCharacter Large Object\u7684\u7f29\u5199\uff0c\u7528\u4e8e\u5b58\u50a8\u5927\u91cf\u7684\u5b57\u7b26\u6570\u636e\uff0c\u5982\u6587\u672c\u3001\u65e5\u5fd7\u7b49\u3002Clob\u7c7b\u578b\u5728Oracle\u6570\u636e\u5e93\u4e2d\u53ef\u4ee5\u5b58\u50a8\u6700\u591a4GB\u5927\u5c0f\u7684\u5b57\u7b26\u6570\u636e\u3002<\/p>\n
      Clob\u7684\u4f18\u52bf\uff1a<\/p>\n
        \n
      1. \u9002\u7528\u4e8e\u5b58\u50a8\u5927\u578b\u5b57\u7b26\u6570\u636e\uff0c\u5982\u6587\u672c\u3001\u65e5\u5fd7\u7b49\uff1b<\/li>\n
      2. \u652f\u6301\u5bf9\u5b57\u7b26\u6570\u636e\u8fdb\u884c\u6587\u672c\u5904\u7406\uff0c\u5982\u641c\u7d22\u3001\u66ff\u6362\u7b49\uff1b<\/li>\n
      3. \u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u6587\u672c\u641c\u7d22\u3002<\/li>\n<\/ol>\n
        Clob\u7684\u52a3\u52bf\uff1a<\/p>\n
          \n
        1. \u5b58\u50a8\u548c\u8bfb\u53d6\u5b57\u7b26\u6570\u636e\u7684\u6548\u7387\u76f8\u5bf9\u8f83\u4f4e\uff1b<\/li>\n
        2. \u5bf9\u4e8e\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u5b58\u50a8\u548c\u5904\u7406\u6548\u7387\u4e0d\u5982Blob\u7c7b\u578b\u9ad8\uff1b<\/li>\n
        3. \u5728\u64cd\u4f5c\u5927\u578b\u6587\u672c\u6570\u636e\u65f6\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/li>\n<\/ol>\n
          \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684Clob\u6570\u636e\u7c7b\u578b\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
          -- \u521b\u5efa\u5305\u542bClob\u6570\u636e\u7c7b\u578b\u7684\u8868\nCREATE TABLE messages (\n    id NUMBER PRIMARY KEY,\n    message CLOB\n);\n\n-- \u63d2\u5165Clob\u6570\u636e\nINSERT INTO messages (id, message)\nVALUES (1, empty_clob());\n\n-- \u5199\u5165Clob\u6570\u636e\nUPDATE messages\nSET message = empty_clob()\nWHERE id = 1;<\/pre>\n
          \u603b\u7ed3\uff1a<\/p>\n
          \u5728\u9009\u62e9Blob\u548cClob\u6570\u636e\u7c7b\u578b\u65f6\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u548c\u6570\u636e\u7279\u70b9\u8fdb\u884c\u8003\u91cf\u3002\u5982\u679c\u9700\u8981\u5b58\u50a8\u5927\u91cf\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5e94\u9009\u62e9Blob\u7c7b\u578b\uff1b\u5982\u679c\u9700\u8981\u5b58\u50a8\u5927\u91cf\u7684\u5b57\u7b26\u6570\u636e\u5e76\u8fdb\u884c\u6587\u672c\u5904\u7406\uff0c\u5e94\u9009\u62e9Clob\u7c7b\u578b\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u7ed3\u5408\u4f7f\u7528Blob\u548cClob\u7c7b\u578b\uff0c\u4ee5\u8fbe\u5230\u6700\u4f73\u7684\u6570\u636e\u5b58\u50a8\u6548\u679c\u3002<\/p>\n
          \u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u6bd4\u8f83\u5206\u6790Oracle\u6570\u636e\u5e93\u4e2dBlob\u548cClob\u6570\u636e\u7c7b\u578b\u7684\u5f02\u540c\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u6570\u636e\u7c7b\u578b,clob,blob\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n
          \n
          \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          \u6bd4\u8f83\u5206\u6790Oracle\u6570\u636e\u5e93\u4e2dBl...<\/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-199946","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199946","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=199946"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199946\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}