{"id":199954,"date":"2025-05-06T10:58:34","date_gmt":"2025-05-06T02:58:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199954\/"},"modified":"2025-05-06T10:58:34","modified_gmt":"2025-05-06T02:58:34","slug":"%e4%bc%98%e5%8c%96oracle%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b%e7%9a%84%e6%89%b9%e9%87%8f%e6%9b%b4%e6%96%b0%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199954\/","title":{"rendered":"\u4f18\u5316Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u6279\u91cf\u66f4\u65b0\u6027\u80fd"},"content":{"rendered":"

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

\u4f18\u5316Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u6279\u91cf\u66f4\u65b0\u6027\u80fd<\/h1>\n

\u5728\u6570\u636e\u5e93\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6574\u7406\u5206\u4eab\u300a\u4f18\u5316Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u6279\u91cf\u66f4\u65b0\u6027\u80fd\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

Oracle\u5b58\u50a8\u8fc7\u7a0b\u6279\u91cf\u66f4\u65b0\u7684\u6027\u80fd\u4f18\u5316\u7b56\u7565<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u5b58\u50a8\u8fc7\u7a0b\u662f\u4e00\u79cd\u7528\u6765\u5904\u7406\u6570\u636e\u903b\u8f91\u6216\u6267\u884c\u7279\u5b9a\u4efb\u52a1\u7684\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u53ef\u4ee5\u63d0\u4f9b\u4e00\u5b9a\u7684\u6027\u80fd\u4f18\u5316\u7b56\u7565\uff0c\u7279\u522b\u662f\u5728\u6279\u91cf\u66f4\u65b0\u6570\u636e\u65f6\u3002\u6279\u91cf\u66f4\u65b0\u6570\u636e\u901a\u5e38\u4f1a\u6d89\u53ca\u5927\u91cf\u7684\u884c\u7ea7\u64cd\u4f5c\uff0c\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\u548c\u6548\u7387\uff0c\u6211\u4eec\u53ef\u4ee5\u91c7\u53d6\u4e00\u4e9b\u7b56\u7565\u548c\u6280\u5de7\u6765\u4f18\u5316\u5b58\u50a8\u8fc7\u7a0b\u7684\u6027\u80fd\u3002\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00\u4e9bOracle\u5b58\u50a8\u8fc7\u7a0b\u6279\u91cf\u66f4\u65b0\u7684\u6027\u80fd\u4f18\u5316\u7b56\u7565\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u4f7f\u7528MERGE\u8bed\u53e5\u8fdb\u884c\u6279\u91cf\u66f4\u65b0<\/li>\n<\/ol>\n

    MERGE\u8bed\u53e5\u662fOracle\u6570\u636e\u5e93\u4e2d\u7528\u6765\u6267\u884c\u5408\u5e76\u64cd\u4f5c\uff08\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664\uff09\u7684\u8bed\u53e5\uff0c\u53ef\u4ee5\u5728\u4e00\u6b21\u67e5\u8be2\u4e2d\u5b8c\u6210\u591a\u4e2a\u64cd\u4f5c\uff0c\u4ece\u800c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684IO\u5f00\u9500\u3002\u5728\u6279\u91cf\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528MERGE\u8bed\u53e5\u6765\u4ee3\u66ff\u4f20\u7edf\u7684UPDATE\u8bed\u53e5\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n

    MERGE INTO target_table USING source_table\nON (target_table.id = source_table.id)\nWHEN MATCHED THEN\nUPDATE SET target_table.column1 = source_table.value1,\n           target_table.column2 = source_table.value2\nWHEN NOT MATCHED THEN\nINSERT (id, column1, column2)\nVALUES (source_table.id, source_table.value1, source_table.value2);<\/pre>\n
    \u4e0a\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0ctarget_table\u4ee3\u8868\u8981\u66f4\u65b0\u7684\u76ee\u6807\u8868\uff0csource_table\u4ee3\u8868\u6570\u636e\u6e90\u8868\uff0c\u901a\u8fc7\u6307\u5b9a\u5339\u914d\u6761\u4ef6\u548c\u66f4\u65b0\/\u63d2\u5165\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5728\u4e00\u6b21MERGE\u64cd\u4f5c\u4e2d\u5b9e\u73b0\u6279\u91cf\u66f4\u65b0\u6570\u636e\u3002<\/p>\n
      \n
    1. \u4f7f\u7528FORALL\u8fdb\u884c\u6279\u91cf\u66f4\u65b0<\/li>\n<\/ol>\n
      FORALL\u662fOracle PL\/SQL\u8bed\u8a00\u4e2d\u7684\u4e00\u79cd\u63a7\u5236\u7ed3\u6784\uff0c\u53ef\u4ee5\u5728\u4e00\u4e2a\u5faa\u73af\u4e2d\u6267\u884c\u4e00\u7ec4DML\u8bed\u53e5\uff0c\u4ece\u800c\u5b9e\u73b0\u6279\u91cf\u66f4\u65b0\u6570\u636e\u3002\u901a\u8fc7\u4f7f\u7528FORALL\u7ed3\u5408BULK COLLECT\u8bed\u53e5\uff0c\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u548c\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u7684\u4ea4\u4e92\u6b21\u6570\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n
      DECLARE\n    TYPE id_array IS TABLE OF target_table.id%TYPE;\n    TYPE value1_array IS TABLE OF target_table.column1%TYPE;\n    TYPE value2_array IS TABLE OF target_table.column2%TYPE;\n    \n    ids id_array;\n    values1 value1_array;\n    values2 value2_array;\nBEGIN\n    -- \u521d\u59cb\u5316\u6570\u636e\n    SELECT id, column1, column2\n    BULK COLLECT INTO ids, values1, values2\n    FROM source_table;\n    \n    -- \u66f4\u65b0\u6570\u636e\n    FORALL i IN 1..ids.COUNT\n        UPDATE target_table\n        SET column1 = values1(i),\n            column2 = values2(i)\n        WHERE id = ids(i);\nEND;<\/pre>\n
      \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7BULK COLLECT\u5c06\u6e90\u8868\u6570\u636e\u4e00\u6b21\u6027\u53d6\u51fa\u5230\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u4f7f\u7528FORALL\u5faa\u73af\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u4ece\u800c\u5b9e\u73b0\u6279\u91cf\u66f4\u65b0\u6570\u636e\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n
        \n
      1. \u4f7f\u7528\u5e76\u884c\u5904\u7406\u52a0\u901f\u66f4\u65b0<\/li>\n<\/ol>\n
        Oracle\u6570\u636e\u5e93\u652f\u6301\u5e76\u884c\u5904\u7406\u529f\u80fd\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u542f\u7528\u5e76\u884c\u5904\u7406\u6765\u52a0\u901f\u6279\u91cf\u66f4\u65b0\u64cd\u4f5c\u3002\u901a\u8fc7\u6307\u5b9aPARALLEL\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u540c\u65f6\u542f\u7528\u591a\u4e2a\u4f1a\u8bdd\u5e76\u884c\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n
        ALTER SESSION ENABLE PARALLEL DML;\n\nUPDATE \/*+ PARALLEL(target_table, 4) *\/ target_table\nSET column1 = (SELECT value1 FROM source_table WHERE id = target_table.id),\n    column2 = (SELECT value2 FROM source_table WHERE id = target_table.id);<\/pre>\n
        \u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6307\u5b9a\u4e86\u66f4\u65b0\u64cd\u4f5c\u4f7f\u75284\u4e2a\u5e76\u884c\u4f1a\u8bdd\u6765\u6267\u884c\uff0c\u53ef\u4ee5\u52a0\u901f\u6279\u91cf\u66f4\u65b0\u64cd\u4f5c\u7684\u6267\u884c\u901f\u5ea6\u3002<\/p>\n
        \u603b\u7ed3\uff1a<\/p>\n
        \u901a\u8fc7\u4f7f\u7528MERGE\u8bed\u53e5\u3001FORALL\u7ed3\u6784\u4ee5\u53ca\u5e76\u884c\u5904\u7406\u7b49\u6027\u80fd\u4f18\u5316\u7b56\u7565\uff0c\u53ef\u4ee5\u63d0\u9ad8Oracle\u5b58\u50a8\u8fc7\u7a0b\u6279\u91cf\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u548c\u6548\u7387\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u573a\u666f\u548c\u6570\u636e\u91cf\u5927\u5c0f\u9009\u62e9\u5408\u9002\u7684\u4f18\u5316\u7b56\u7565\u6765\u4f18\u5316\u5b58\u50a8\u8fc7\u7a0b\u7684\u6027\u80fd\u3002\u5e0c\u671b\u4ee5\u4e0a\u5185\u5bb9\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528Oracle\u6570\u636e\u5e93\u7684\u6027\u80fd\u4f18\u5316\u7b56\u7565\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u300a\u4f18\u5316Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u6279\u91cf\u66f4\u65b0\u6027\u80fd\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eOracle,\u6027\u80fd\u4f18\u5316,\u5b58\u50a8\u8fc7\u7a0b\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u4f18\u5316Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u6279\u91cf\u66f4...<\/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-199954","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199954","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=199954"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199954\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}