{"id":199823,"date":"2025-05-06T11:09:29","date_gmt":"2025-05-06T03:09:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199823\/"},"modified":"2025-05-06T11:09:29","modified_gmt":"2025-05-06T03:09:29","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3oracle%e5%ba%8f%e5%88%97%e5%8f%b7%e6%9f%a5%e8%af%a2%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199823\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684\u65b9\u6cd5"},"content":{"rendered":"

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

\u6df1\u5165\u4e86\u89e3Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684\u65b9\u6cd5<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300a\u6df1\u5165\u4e86\u89e3Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684\u65b9\u6cd5\u300b\uff0c\u8986\u76d6\u4e86\u6570\u636e\u5e93\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u65b9\u6cd5\u8be6\u89e3<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u5e8f\u5217\u662f\u7528\u6765\u751f\u6210\u552f\u4e00\u9012\u589e\u6216\u9012\u51cf\u6570\u5b57\u7684\u5bf9\u8c61\uff0c\u5e38\u7528\u4e8e\u4e3a\u8868\u7684\u4e3b\u952e\u751f\u6210\u552f\u4e00\u503c\u3002\u5728\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u65f6\uff0c\u6709\u65f6\u5019\u9700\u8981\u67e5\u8be2\u5e8f\u5217\u7684\u5f53\u524d\u503c\u6216\u4e0b\u4e00\u4e2a\u503c\uff0c\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdOracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u901a\u8fc7SQL\u8bed\u53e5\u548cPL\/SQL\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u901a\u8fc7SQL\u8bed\u53e5\u67e5\u8be2\u5e8f\u5217\u53f7<\/h3>\n

\u8981\u901a\u8fc7SQL\u8bed\u53e5\u67e5\u8be2\u5e8f\u5217\u53f7\uff0c\u53ef\u4ee5\u4f7f\u7528USER_SEQUENCES<\/code>\u7cfb\u7edf\u89c6\u56fe\u6216DBA_SEQUENCES<\/code>\u89c6\u56fe\u3002\u4ee5\u4e0b\u662f\u901a\u8fc7SQL\u8bed\u53e5\u67e5\u8be2\u5e8f\u5217\u53f7\u7684\u6b65\u9aa4\uff1a<\/p>\n

    \n
  1. \n

    \u67e5\u8be2\u5f53\u524d\u7528\u6237\u62e5\u6709\u7684\u5e8f\u5217\u4fe1\u606f\uff1a<\/p>\n

    SELECT sequence_name, min_value, max_value, increment_by, last_number\nFROM user_sequences;<\/pre>\n
    \u8fd9\u6761SQL\u8bed\u53e5\u4f1a\u8fd4\u56de\u5f53\u524d\u7528\u6237\u6240\u6709\u5e8f\u5217\u7684\u540d\u79f0\u3001\u6700\u5c0f\u503c\u3001\u6700\u5927\u503c\u3001\u589e\u91cf\u4ee5\u53ca\u6700\u540e\u751f\u6210\u7684\u5e8f\u5217\u53f7\u3002<\/p>\n<\/li>\n
  2. \n
    \u67e5\u8be2\u6307\u5b9a\u5e8f\u5217\u7684\u5f53\u524d\u503c\uff1a<\/p>\n
    SELECT last_number\nFROM user_sequences\nWHERE sequence_name = 'SEQ_NAME';<\/pre>\n
    \u5c06SEQ_NAME<\/code>\u66ff\u6362\u4e3a\u4f60\u8981\u67e5\u8be2\u7684\u5e8f\u5217\u540d\u79f0\uff0c\u6267\u884c\u8be5SQL\u8bed\u53e5\u53ef\u4ee5\u5f97\u5230\u6307\u5b9a\u5e8f\u5217\u7684\u5f53\u524d\u503c\u3002<\/p>\n<\/li>\n<\/ol>\n
    \u901a\u8fc7PL\/SQL\u4ee3\u7801\u67e5\u8be2\u5e8f\u5217\u53f7<\/h3>\n
    \u9664\u4e86\u4f7f\u7528SQL\u8bed\u53e5\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7PL\/SQL\u4ee3\u7801\u67e5\u8be2\u5e8f\u5217\u53f7\u3002\u4ee5\u4e0b\u662f\u901a\u8fc7PL\/SQL\u4ee3\u7801\u67e5\u8be2\u5e8f\u5217\u53f7\u7684\u793a\u4f8b\uff1a<\/p>\n
      \n
    1. \n
      \u67e5\u8be2\u6307\u5b9a\u5e8f\u5217\u7684\u4e0b\u4e00\u4e2a\u503c\uff1a<\/p>\n
      DECLARE\n next_val NUMBER;\nBEGIN\n SELECT SEQ_NAME.NEXTVAL\n INTO next_val\n FROM dual;\n DBMS_OUTPUT.PUT_LINE('Next value of SEQ_NAME is ' || next_val);\nEND;<\/pre>\n
      \u8fd9\u6bb5PL\/SQL\u4ee3\u7801\u4f1a\u67e5\u8be2\u540d\u4e3aSEQ_NAME<\/code>\u7684\u5e8f\u5217\u7684\u4e0b\u4e00\u4e2a\u503c\uff0c\u5e76\u5c06\u7ed3\u679c\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<\/li>\n
    2. \n
      \u67e5\u8be2\u6240\u6709\u5e8f\u5217\u7684\u5f53\u524d\u503c\uff1a<\/p>\n
      DECLARE\n seq_name VARCHAR2(100);\n last_num NUMBER;\nBEGIN\n FOR seq_rec IN (SELECT sequence_name FROM user_sequences) LOOP\n     seq_name := seq_rec.sequence_name;\n     EXECUTE IMMEDIATE 'SELECT ' || seq_name || '.last_number FROM dual' INTO last_num;\n     DBMS_OUTPUT.PUT_LINE('Current value of ' || seq_name || ' is ' || last_num);\n END LOOP;\nEND;<\/pre>\n
      \u8fd9\u6bb5PL\/SQL\u4ee3\u7801\u904d\u5386\u5f53\u524d\u7528\u6237\u7684\u6240\u6709\u5e8f\u5217\uff0c\u67e5\u8be2\u5b83\u4eec\u7684\u5f53\u524d\u503c\u5e76\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<\/li>\n<\/ol>\n
      \u901a\u8fc7\u4ee5\u4e0aSQL\u8bed\u53e5\u548cPL\/SQL\u4ee3\u7801\u793a\u4f8b\uff0c\u4f60\u53ef\u4ee5\u7075\u6d3b\u5730\u5728Oracle\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u5e8f\u5217\u53f7\u7684\u4fe1\u606f\uff0c\u65b9\u4fbf\u8fdb\u884c\u6570\u636e\u5e93\u7ba1\u7406\u548c\u5f00\u53d1\u64cd\u4f5c\u3002<\/p>\n
      \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u6df1\u5165\u4e86\u89e3Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684\u65b9\u6cd5\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n
      \n
      \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      \u6df1\u5165\u4e86\u89e3Oracle\u5e8f\u5217\u53f7\u67e5\u8be2\u7684...<\/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-199823","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199823","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=199823"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199823\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}