{"id":199924,"date":"2025-05-06T11:04:59","date_gmt":"2025-05-06T03:04:59","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199924\/"},"modified":"2025-05-06T11:04:59","modified_gmt":"2025-05-06T03:04:59","slug":"%e6%af%94%e8%be%83oracle%e4%b8%adblob%e5%92%8cclob%e7%9a%84%e5%ba%94%e7%94%a8%e8%8c%83%e5%9b%b4%e5%92%8c%e7%89%b9%e7%82%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199924\/","title":{"rendered":"\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u70b9"},"content":{"rendered":"

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

\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u70b9<\/h1>\n

\u79ef\u7d2f\u77e5\u8bc6\uff0c\u80dc\u8fc7\u79ef\u84c4\u91d1\u94f6\uff01\u6bd5\u7adf\u5728\u6570\u636e\u5e93\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u5f80\u5f80\u90fd\u662f\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u6ca1\u6709\u638c\u63e1\u597d\u800c\u5bfc\u81f4\u7684\uff0c\u56e0\u6b64\u57fa\u7840\u77e5\u8bc6\u70b9\u7684\u79ef\u7d2f\u662f\u5f88\u91cd\u8981\u7684\u3002\u4e0b\u9762\u672c\u6587\u300a\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u70b9\u300b\uff0c\u5c31\u5e26\u5927\u5bb6\u8bb2\u89e3\u4e00\u4e0b\u77e5\u8bc6\u70b9\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/p>\n

Blob \u548c Clob \u5728 Oracle \u4e2d\u90fd\u662f\u7528\u6765\u5b58\u50a8\u5927\u6570\u636e\u7c7b\u578b\u7684\u5b57\u6bb5\uff0c\u4f46\u5b83\u4eec\u5728\u5177\u4f53\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u6027\u4e0a\u6709\u4e00\u4e9b\u4e0d\u540c\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u6bd4\u8f83 Blob \u548c Clob \u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u5e76\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u5c55\u793a\u5b83\u4eec\u7684\u5e94\u7528\u3002<\/p>\n

Blob \u548c Clob \u7684\u5b9a\u4e49<\/h3>\n

\u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0cBlob \u8868\u793a\u4e8c\u8fdb\u5236\u5927\u5bf9\u8c61(Binary Large Object)\uff0c\u901a\u5e38\u7528\u6765\u5b58\u50a8\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u4e8c\u8fdb\u5236\u6570\u636e\u3002\u800c Clob \u5219\u8868\u793a\u5b57\u7b26\u5927\u5bf9\u8c61(Character Large Object)\uff0c\u4e00\u822c\u7528\u6765\u5b58\u50a8\u6587\u672c\u3001HTML\u3001XML \u7b49\u5b57\u7b26\u6570\u636e\u3002<\/p>\n

Blob \u7684\u7279\u6027<\/h3>\n
    \n
  1. Blob \u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u9002\u7528\u4e8e\u5b58\u50a8\u5927\u6587\u4ef6\u3001\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u6570\u636e\u3002<\/li>\n
  2. Blob \u7684\u6700\u5927\u5927\u5c0f\u4e3a 4GB\u3002<\/li>\n
  3. Blob \u7684\u5199\u5165\u548c\u8bfb\u53d6\u64cd\u4f5c\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8c\u8fdb\u5236\u6d41\u8fdb\u884c\uff0c\u66f4\u9002\u5408\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/li>\n
  4. Blob \u53ef\u4ee5\u901a\u8fc7 PL\/SQL \u5305\u4e2d\u7684 DBMS_LOB \u5305\u6765\u8fdb\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\uff0c\u5982\u622a\u53d6\u3001\u62f7\u8d1d\u7b49\u3002<\/li>\n<\/ol>\n

    Clob \u7684\u7279\u6027<\/h3>\n
      \n
    1. Clob \u5b58\u50a8\u5b57\u7b26\u6570\u636e\uff0c\u9002\u7528\u4e8e\u5b58\u50a8\u6587\u672c\u3001HTML\u3001XML \u7b49\u6570\u636e\u3002<\/li>\n
    2. Clob \u7684\u6700\u5927\u5927\u5c0f\u4e0e Blob \u76f8\u540c\uff0c\u4e3a 4GB\u3002<\/li>\n
    3. Clob \u7684\u5199\u5165\u548c\u8bfb\u53d6\u64cd\u4f5c\u901a\u5e38\u9700\u8981\u8003\u8651\u5b57\u7b26\u7f16\u7801\uff0c\u5982 UTF-8\u3001GBK \u7b49\u3002<\/li>\n
    4. Clob \u4e5f\u53ef\u4ee5\u901a\u8fc7 PL\/SQL \u5305\u4e2d\u7684 DBMS_LOB \u5305\u6765\u8fdb\u884c\u76f8\u5173\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n

      Blob \u548c Clob \u7684\u4f7f\u7528\u6bd4\u8f83<\/h3>\n
        \n
      1. \u5f53\u9700\u8981\u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\u65f6\uff0c\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\uff0c\u5e94\u8be5\u9009\u62e9 Blob\u3002<\/li>\n
      2. \u5f53\u9700\u8981\u5b58\u50a8\u6587\u672c\u6570\u636e\u65f6\uff0c\u5982\u6587\u6863\u3001HTML\u3001XML \u7b49\uff0c\u5e94\u8be5\u9009\u62e9 Clob\u3002<\/li>\n
      3. \u5bf9\u4e8e\u64cd\u4f5c\u5927\u6587\u4ef6\u6216\u5927\u6570\u636e\u65f6\uff0cBlob \u66f4\u65b9\u4fbf\u76f4\u63a5\u4f7f\u7528\u4e8c\u8fdb\u5236\u6d41\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002<\/li>\n
      4. \u5728\u8fdb\u884c\u6570\u636e\u5e93\u67e5\u8be2\u65f6\uff0cClob \u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u6587\u672c\u641c\u7d22\u7b49\u64cd\u4f5c\uff0c\u66f4\u9002\u5408\u5904\u7406\u5b57\u7b26\u6570\u636e\u3002<\/li>\n<\/ol>\n

        Blob \u548c Clob \u7684\u4ee3\u7801\u793a\u4f8b<\/h3>\n

        \u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u5c55\u793a Blob \u548c Clob \u7684\u5e94\u7528\uff1a<\/p>\n

        -- \u521b\u5efa\u4e00\u4e2a\u5305\u542b Blob \u548c Clob \u5b57\u6bb5\u7684\u8868\nCREATE TABLE Media (\n    id NUMBER PRIMARY KEY,\n    image_data BLOB,\n    text_data CLOB\n);\n\n-- \u63d2\u5165\u4e00\u6761\u6570\u636e\nINSERT INTO Media (id, image_data, text_data)\nVALUES (1, empty_blob(), empty_clob());\n\n-- \u66f4\u65b0 Blob \u5b57\u6bb5\nDECLARE\n    v_blob BLOB;\nBEGIN\n    SELECT image_data INTO v_blob FROM Media WHERE id = 1 FOR UPDATE;\n    DBMS_LOB.WRITE(v_blob, 10, 1, 'BinaryData');\n    COMMIT;\nEND;\n\n-- \u66f4\u65b0 Clob \u5b57\u6bb5\nDECLARE\n    v_clob CLOB;\nBEGIN\n    SELECT text_data INTO v_clob FROM Media WHERE id = 1 FOR UPDATE;\n    DBMS_LOB.WRITE(v_clob, 10, 1, 'TextData');\n    COMMIT;\nEND;<\/pre>\n
        \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u5305\u542b Blob \u548c Clob \u5b57\u6bb5\u7684\u8868 Media\uff0c\u5e76\u5bf9\u5176\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u4e86\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Blob \u548c Clob \u5b58\u50a8\u548c\u64cd\u4f5c\u5927\u6570\u636e\u7c7b\u578b\u5b57\u6bb5\u3002<\/p>\n
        \u7efc\u4e0a\u6240\u8ff0\uff0cBlob \u548c Clob \u5728 Oracle \u6570\u636e\u5e93\u4e2d\u6709\u7740\u4e0d\u540c\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u6027\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u7c7b\u578b\u6765\u5b58\u50a8\u5927\u6570\u636e\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5408\u7406\u4f7f\u7528 Blob \u548c Clob \u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5b58\u50a8\u548c\u68c0\u7d22\u7684\u6548\u7387\uff0c\u4e5f\u66f4\u7b26\u5408\u6570\u636e\u7684\u5b9e\u9645\u5b58\u50a8\u9700\u6c42\u3002<\/p>\n
        \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5e94\u7528\u8303\u56f4\u548c\u7279\u70b9\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6570\u636e\u5e93\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u6bd4\u8f83Oracle\u4e2dBlob\u548cCl...<\/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-199924","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199924","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=199924"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199924\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}