{"id":199910,"date":"2025-05-06T10:23:51","date_gmt":"2025-05-06T02:23:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199910\/"},"modified":"2025-05-06T10:23:51","modified_gmt":"2025-05-06T02:23:51","slug":"%e6%af%94%e8%be%83oracle%e4%b8%adblob%e5%92%8cclob%e7%9a%84%e5%ad%98%e5%82%a8%e5%8e%9f%e7%90%86%e5%8f%8a%e9%80%82%e7%94%a8%e5%9c%ba%e6%99%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199910\/","title":{"rendered":"\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5b58\u50a8\u539f\u7406\u53ca\u9002\u7528\u573a\u666f"},"content":{"rendered":"

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

\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5b58\u50a8\u539f\u7406\u53ca\u9002\u7528\u573a\u666f<\/h1>\n

\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

Oracle\u4e2dBlob\u548cClob\u7684\u5b58\u50a8\u539f\u7406\u53ca\u9002\u7528\u573a\u666f\u5bf9\u6bd4<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0cBlob\u548cClob\u662f\u4e24\u79cd\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u6765\u5b58\u50a8\u5927\u5bb9\u91cf\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff08Blob\uff09\u548c\u5b57\u7b26\u6570\u636e\uff08Clob\uff09\u3002\u672c\u6587\u5c06\u5206\u522b\u4ecb\u7ecdBlob\u548cClob\u7684\u5b58\u50a8\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u4eec\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u9002\u7528\u6027\uff0c\u5e76\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u52a0\u6df1\u7406\u89e3\u3002<\/p>\n

Blob\u7684\u5b58\u50a8\u539f\u7406<\/h3>\n

Blob\u662fBinary Large Object\u7684\u7f29\u5199\uff0c\u7528\u4e8e\u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u6bd4\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\u3002Blob\u7c7b\u578b\u6570\u636e\u5728\u6570\u636e\u5e93\u4e2d\u4ee5\u4e8c\u8fdb\u5236\u683c\u5f0f\u5b58\u50a8\uff0c\u901a\u5e38\u7528\u6765\u5b58\u50a8\u5927\u6587\u4ef6\u6216\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n

Blob\u7684\u5b58\u50a8\u539f\u7406\u662f\u5c06\u4e8c\u8fdb\u5236\u6570\u636e\u4ee5\u5b57\u8282\u6d41\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u3002\u6570\u636e\u5e93\u4f1a\u6839\u636eBlob\u6570\u636e\u7684\u5927\u5c0f\u6765\u52a8\u6001\u5206\u914d\u5b58\u50a8\u7a7a\u95f4\uff0c\u4fdd\u8bc1\u6570\u636e\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n

Clob\u7684\u5b58\u50a8\u539f\u7406<\/h3>\n

Clob\u662fCharacter Large Object\u7684\u7f29\u5199\uff0c\u7528\u4e8e\u5b58\u50a8\u5927\u91cf\u7684\u5b57\u7b26\u6570\u636e\uff0c\u6bd4\u5982\u6587\u672c\u3001\u4ee3\u7801\u7b49\u3002Clob\u7c7b\u578b\u6570\u636e\u5728\u6570\u636e\u5e93\u4e2d\u4ee5\u5b57\u7b26\u683c\u5f0f\u5b58\u50a8\uff0c\u901a\u5e38\u7528\u6765\u5b58\u50a8\u6587\u672c\u6570\u636e\u3002<\/p>\n

Clob\u7684\u5b58\u50a8\u539f\u7406\u662f\u5c06\u5b57\u7b26\u6570\u636e\u4ee5\u5b57\u7b26\u6d41\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u3002\u6570\u636e\u5e93\u4f1a\u6839\u636eClob\u6570\u636e\u7684\u5927\u5c0f\u6765\u52a8\u6001\u5206\u914d\u5b58\u50a8\u7a7a\u95f4\uff0c\u5e76\u6839\u636e\u5b57\u7b26\u96c6\u5bf9\u6570\u636e\u8fdb\u884c\u7f16\u7801\u5b58\u50a8\u3002<\/p>\n

Blob\u548cClob\u9002\u7528\u573a\u666f\u5bf9\u6bd4<\/h3>\n
    \n
  1. \n

    Blob\u9002\u7528\u573a\u666f\uff1a<\/p>\n

      \n
    • \u5b58\u50a8\u5927\u6587\u4ef6\uff08\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49\uff09\uff1b<\/li>\n
    • \u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5982\u538b\u7f29\u5305\u3001\u5e8f\u5217\u5316\u5bf9\u8c61\u7b49\uff1b<\/li>\n
    • \u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u4e8c\u8fdb\u5236\u64cd\u4f5c\u6216\u5904\u7406\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \n

      Clob\u9002\u7528\u573a\u666f\uff1a<\/p>\n

        \n
      • \u5b58\u50a8\u5927\u6587\u672c\u5185\u5bb9\uff0c\u5982\u6587\u7ae0\u3001\u65e5\u5fd7\u3001\u4ee3\u7801\u7b49\uff1b<\/li>\n
      • \u5b58\u50a8\u5b57\u7b26\u6570\u636e\uff0c\u5982XML\u3001JSON\u7b49\u683c\u5f0f\u6570\u636e\uff1b<\/li>\n
      • \u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u6587\u672c\u64cd\u4f5c\u6216\u5904\u7406\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

        Blob\u548cClob\u7684\u4ee3\u7801\u793a\u4f8b<\/h3>\n

        Blob\u793a\u4f8b\uff1a<\/h4>\n
        CREATE TABLE Blob_Table (\n    id NUMBER PRIMARY KEY,\n    image_data BLOB\n);\n\nINSERT INTO Blob_Table (id, image_data) VALUES (1, EMPTY_BLOB());\n\nDECLARE\n    l_blob BLOB;\nBEGIN\n    SELECT image_data INTO l_blob FROM Blob_Table WHERE id = 1 FOR UPDATE;\n    DBMS_LOB.WRITE(l_blob, DBMS_LOB.GETLENGTH(l_blob), 1, utl_raw.cast_to_raw('Insert Blob Data Here'));\n    COMMIT;\nEND;\n\/<\/pre>\n
        Clob\u793a\u4f8b\uff1a<\/h4>\n
        CREATE TABLE Clob_Table (\n    id NUMBER PRIMARY KEY,\n    text_data CLOB\n);\n\nINSERT INTO Clob_Table (id, text_data) VALUES (1, 'Insert Clob Data Here');\n\nDECLARE\n    l_clob CLOB;\nBEGIN\n    SELECT text_data INTO l_clob FROM Clob_Table WHERE id = 1 FOR UPDATE;\n    l_clob := l_clob || ' Appending Clob Data Here';\n    UPDATE Clob_Table SET text_data = l_clob WHERE id = 1;\n    COMMIT;\nEND;\n\/<\/pre>\n
        \u603b\u7ed3<\/h3>\n
        Blob\u548cClob\u662fOracle\u6570\u636e\u5e93\u4e2d\u7528\u4e8e\u5b58\u50a8\u5927\u5bb9\u91cf\u6570\u636e\u7684\u4e24\u79cd\u7c7b\u578b\uff0c\u5206\u522b\u9002\u7528\u4e8e\u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\u548c\u5b57\u7b26\u6570\u636e\u3002Blob\u4ee5\u4e8c\u8fdb\u5236\u5f62\u5f0f\u5b58\u50a8\u6570\u636e\uff0c\u9002\u7528\u4e8e\u5b58\u50a8\u5927\u6587\u4ef6\u548c\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u800cClob\u4ee5\u5b57\u7b26\u5f62\u5f0f\u5b58\u50a8\u6570\u636e\uff0c\u9002\u7528\u4e8e\u5b58\u50a8\u5927\u6587\u672c\u5185\u5bb9\u548c\u5b57\u7b26\u6570\u636e\u3002\u5728\u4f7f\u7528Blob\u548cClob\u65f6\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u4e86\u89e3\u5176\u5b58\u50a8\u539f\u7406\u4ee5\u4fbf\u6709\u6548\u5730\u64cd\u4f5c\u548c\u7ba1\u7406\u5927\u5bb9\u91cf\u6570\u636e\u3002<\/p>\n
        \u6587\u4e2d\u5173\u4e8eOracle,clob,blob\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u6bd4\u8f83Oracle\u4e2dBlob\u548cClob\u7684\u5b58\u50a8\u539f\u7406\u53ca\u9002\u7528\u573a\u666f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/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-199910","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199910","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=199910"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199910\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}