{"id":5595,"date":"2024-11-14T08:30:29","date_gmt":"2024-11-14T00:30:29","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5595\/"},"modified":"2024-11-14T08:30:29","modified_gmt":"2024-11-14T00:30:29","slug":"oracle%e8%a7%a6%e5%8f%91%e5%99%a8%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5595\/","title":{"rendered":"oracle\u89e6\u53d1\u5668\u600e\u4e48\u5199"},"content":{"rendered":"

\n oracle \u89e6\u53d1\u5668\u662f\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u7528\u4e8e\u5728\u7279\u5b9a\u4e8b\u4ef6\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u53d1\u751f\u65f6\u6267\u884c\u4e1a\u52a1\u89c4\u5219\u6216\u64cd\u4f5c\u3002\u521b\u5efa\u89e6\u53d1\u5668\u9700\u6309\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\uff1a1. \u521b\u5efa\u89e6\u53d1\u5668\uff0c\u6307\u5b9a\u540d\u79f0\u3001\u4e8b\u4ef6\u3001\u8868\u548c for each row\uff1b2. \u7f16\u5199\u89e6\u53d1\u5668\u4ee3\u7801\uff0c\u6267\u884c\u9a8c\u8bc1\u3001\u8bb0\u5f55\u3001\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u7b49\u64cd\u4f5c\uff1b3. \u6307\u5b9a\u89e6\u53d1\u65f6\u673a\uff08before\u3001after \u6216 instead of\uff09\uff1b4. \u7f16\u8bd1\u89e6\u53d1\u5668\u3002\n<\/p><\/blockquote>\n

\"oracle\u89e6\u53d1\u5668\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u7f16\u5199 Oracle \u89e6\u53d1\u5668<\/strong><\/p>\n

Oracle \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u6307\u5b9a\u7684\u4e8b\u4ef6\u53d1\u751f\u65f6\u5c31\u4f1a\u81ea\u52a8\u6267\u884c\u3002\u89e6\u53d1\u5668\u7528\u4e8e\u5728\u6267\u884c SQL \u64cd\u4f5c\uff08\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u65f6\u5e94\u7528\u4e1a\u52a1\u89c4\u5219\u6216\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u3002<\/p>\n

\u7f16\u5199\u4e00\u4e2a Oracle \u89e6\u53d1\u5668\u7684\u4e00\u822c\u6b65\u9aa4\uff1a<\/strong><\/p>\n

1. \u521b\u5efa\u89e6\u53d1\u5668\uff1a<\/strong><\/p>\n

CREATE TRIGGER <trigger_name>\nBEFORE | AFTER | INSTEAD OF\n<event>\nON <table_name>\nFOR EACH ROW AS\nBEGIN\n  -- \u89e6\u53d1\u5668\u4ee3\u7801\nEND;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \n
  • trigger_name\uff1a\u89e6\u53d1\u5668\u7684\u540d\u79f0\u3002<\/li>\n
  • event\uff1a\u89e6\u53d1\u5668\u5c06\u9488\u5bf9\u7684\u4e8b\u4ef6\uff0c\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002<\/li>\n
  • table_name\uff1a\u89e6\u53d1\u5668\u5c06\u5e94\u7528\u5230\u7684\u8868\u3002<\/li>\n
  • FOR EACH ROW\uff1a\u6307\u5b9a\u89e6\u53d1\u5668\u5c06\u5728\u53d7\u5f71\u54cd\u7684\u6bcf\u4e00\u884c\u4e0a\u6267\u884c\u3002<\/li>\n<\/ul>\n
    2. \u7f16\u5199\u89e6\u53d1\u5668\u4ee3\u7801\uff1a<\/strong><\/p>\n
    \u89e6\u53d1\u5668\u4ee3\u7801\u53ef\u4ee5\u6267\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u4f8b\u5982\uff1a<\/p>\n
      \n
    • \u9a8c\u8bc1\u6216\u4fee\u6539\u63d2\u5165\/\u66f4\u65b0\/\u5220\u9664\u64cd\u4f5c\u7684\u6570\u636e\u3002<\/li>\n
    • \u8bb0\u5f55\u64cd\u4f5c\u8be6\u7ec6\u4fe1\u606f\uff08\u4f8b\u5982\uff0c\u64cd\u4f5c\u7528\u6237\u3001\u64cd\u4f5c\u65f6\u95f4\uff09\u3002<\/li>\n
    • \u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u6216\u51fd\u6570\u6267\u884c\u66f4\u590d\u6742\u7684\u903b\u8f91\u3002<\/li>\n<\/ul>\n
      3. \u6307\u5b9a\u89e6\u53d1\u65f6\u673a\uff1a<\/strong><\/p>\n
      \u89e6\u53d1\u5668\u53ef\u4ee5\u6307\u5b9a\u5728\u4e09\u79cd\u65f6\u673a\u6267\u884c\uff1a<\/p>\n
        \n
      • BEFORE\uff1a\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u524d\u6267\u884c\u3002<\/li>\n
      • AFTER\uff1a\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u540e\u6267\u884c\u3002<\/li>\n
      • INSTEAD OF\uff1a\u66ff\u6362\u6267\u884c\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n
        4. \u7f16\u8bd1\u89e6\u53d1\u5668\uff1a<\/strong><\/p>\n
        \u5728\u521b\u5efa\u89e6\u53d1\u5668\u540e\uff0c\u9700\u8981\u901a\u8fc7\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u5bf9\u5176\u8fdb\u884c\u7f16\u8bd1\uff1a<\/p>\n
        ALTER TRIGGER <trigger_name> COMPILE;<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u793a\u4f8b\uff1a\u5728 INSERT \u64cd\u4f5c\u4e4b\u524d\u9a8c\u8bc1\u6570\u636e<\/strong><\/p>\n
        CREATE TRIGGER validate_insert_data\nBEFORE INSERT ON employees\nFOR EACH ROW\nBEGIN\n  IF :NEW.salary < 10000 THEN\n    RAISE_APPLICATION_ERROR(-20001, 'Salary must be greater than 10,000');\n  END IF;\nEND;<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u8fd9\u4e2a\u89e6\u53d1\u5668\u5c06\u5728\u6267\u884c INSERT \u64cd\u4f5c\u4e4b\u524d\u6267\u884c\uff0c\u5e76\u68c0\u67e5\u65b0\u63d2\u5165\u7684\u884c\u4e2d salary \u5b57\u6bb5\u7684\u503c\u662f\u5426\u5927\u4e8e 10,000\u3002\u5982\u679c\u4e0d\u662f\uff0c\u5c06\u5f15\u53d1\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u9519\u8bef\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u89e6\u53d1\u5668\u600e\u4e48\u5199\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        oracle \u89e6\u53d1\u5668\u662f\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u7528\u4e8e\u5728\u7279\u5b9a\u4e8b\u4ef6\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u53d1\u751f\u65f6\u6267\u884c\u4e1a\u52a1\u89c4\u5219\u6216\u64cd\u4f5c\u3002\u521b\u5efa\u89e6\u53d1\u5668\u9700\u6309\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\uff1a1. \u521b\u5efa\u89e6\u53d1\u5668\uff0c\u6307\u5b9a\u540d\u79f0\u3001\u4e8b\u4ef6\u3001\u8868\u548c for each row\uff1b2. \u7f16\u5199\u89e6\u53d1\u5668\u4ee3\u7801\uff0c\u6267\u884c\u9a8c\u8bc1\u3001\u8bb0\u5f55\u3001\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u7b49\u64cd\u4f5c\uff1b3. \u6307\u5b9a\u89e6\u53d1\u65f6\u673a\uff08before\u3001after \u6216 instead of\uff09\uff1b4. \u7f16\u8bd1\u89e6\u53d1\u5668\u3002 \u5982\u4f55\u7f16\u5199 Oracle \u89e6\u53d1\u5668 Oracle \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u6307\u5b9a\u7684\u4e8b\u4ef6\u53d1\u751f\u65f6\u5c31\u4f1a\u81ea\u52a8\u6267\u884c\u3002\u89e6\u53d1\u5668\u7528\u4e8e\u5728\u6267\u884c SQL \u64cd\u4f5c\uff08\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u65f6\u5e94\u7528\u4e1a\u52a1\u89c4\u5219\u6216\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u3002 \u7f16\u5199\u4e00\u4e2a Oracle \u89e6\u53d1\u5668\u7684\u4e00\u822c\u6b65\u9aa4\uff1a 1. \u521b\u5efa\u89e6\u53d1\u5668\uff1a CREATE TRIGGER <trigger_name> BEFORE | AFTER | INSTEAD OF <event> ON <table_name> FOR EACH ROW AS BEGIN — \u89e6\u53d1\u5668\u4ee3\u7801 END; \u767b\u5f55\u540e\u590d\u5236 trigger_name\uff1a\u89e6\u53d1\u5668\u7684\u540d\u79f0\u3002 event\uff1a\u89e6\u53d1\u5668\u5c06\u9488\u5bf9\u7684\u4e8b\u4ef6\uff0c\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002 table_name\uff1a\u89e6\u53d1\u5668\u5c06\u5e94\u7528\u5230\u7684\u8868\u3002 FOR EACH ROW\uff1a\u6307\u5b9a\u89e6\u53d1\u5668\u5c06\u5728\u53d7\u5f71\u54cd\u7684\u6bcf\u4e00\u884c\u4e0a\u6267\u884c\u3002 2. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5595","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5595"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5595\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}