{"id":5005,"date":"2024-11-14T12:39:19","date_gmt":"2024-11-14T04:39:19","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5005\/"},"modified":"2024-11-14T12:39:19","modified_gmt":"2024-11-14T04:39:19","slug":"oracle%e8%a7%a6%e5%8f%91%e5%99%a8%e6%80%8e%e4%b9%88%e5%81%9a","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5005\/","title":{"rendered":"oracle\u89e6\u53d1\u5668\u600e\u4e48\u505a"},"content":{"rendered":"

\n \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5141\u8bb8\u5728insert\u3001update\u6216delete\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u3002\u521b\u5efa\u89e6\u53d1\u5668\uff1a\u4f7f\u7528create trigger\u8bed\u53e5\uff0c\u6307\u5b9a\u89e6\u53d1\u5668\u540d\u79f0\u3001\u4e8b\u4ef6\u7c7b\u578b\u3001\u8868\u540d\u548c\u89e6\u53d1\u5668\u903b\u8f91\u3002\u89e6\u53d1\u5668\u7c7b\u578b\uff1a\u53ef\u9009\u62e9before\uff08\u4e8b\u4ef6\u524d\u6267\u884c\uff09\u3001after\uff08\u4e8b\u4ef6\u540e\u6267\u884c\uff09\u6216instead of\uff08\u53d6\u4ee3\u4e8b\u4ef6\uff09\u3002\u89e6\u53d1\u5668\u4e8b\u4ef6\uff1a\u5305\u62ecinsert\uff08\u63d2\u5165\uff09\u3001update\uff08\u66f4\u65b0\uff09\u548cdelete\uff08\u5220\u9664\uff09\u3002\u89e6\u53d1\u5668\u4e3b\u4f53\uff1a\u5305\u542b\u89e6\u53d1\u5668\u903b\u8f91\uff0c\u53ef\u5305\u62ecsql\u3001pl\/sql\u6216\u5176\u4ed6\u89e6\u53d1\u5668\u3002\n<\/p><\/blockquote>\n

\"oracle\u89e6\u53d1\u5668\u600e\u4e48\u505a\u63d2\u56fe\"<\/p>\n

Oracle\u89e6\u53d1\u5668\u521b\u5efa\u6307\u5357<\/strong><\/p>\n

\u89e6\u53d1\u5668\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n

\u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5b83\u5141\u8bb8\u4f60\u5728\u6570\u636e\u5e93\u4e8b\u4ef6\uff08\u5982INSERT\u3001UPDATE\u6216DELETE\u64cd\u4f5c\uff09\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u3002<\/p>\n

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

\u8981\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8bed\u53e5CREATE TRIGGER\u3002\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

CREATE TRIGGER trigger_name \nBEFORE\/AFTER\n[INSTEAD OF] \nevent_type\nON table_name\nFOR EACH ROW\nAS\n-- \u89e6\u53d1\u5668\u903b\u8f91<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u89e6\u53d1\u5668\u7c7b\u578b<\/strong><\/p>\n
    \n
  •  BEFORE\u89e6\u53d1\u5668\uff1a<\/strong>\u5728\u4e8b\u4ef6\u53d1\u751f\u4e4b\u524d\u6267\u884c\u3002<\/li>\n
  •  AFTER\u89e6\u53d1\u5668\uff1a<\/strong>\u5728\u4e8b\u4ef6\u53d1\u751f\u4e4b\u540e\u6267\u884c\u3002<\/li>\n
  •  INSTEAD OF\u89e6\u53d1\u5668\uff1a<\/strong>\u53d6\u4ee3\u4e8b\u4ef6\u672c\u8eab\u7684\u6267\u884c\uff0c\u6267\u884c\u89e6\u53d1\u5668\u903b\u8f91\u3002<\/li>\n<\/ul>\n
    \u89e6\u53d1\u5668\u4e8b\u4ef6<\/strong><\/p>\n
      \n
    •  INSERT<\/strong>\uff1a\u63d2\u5165\u65b0\u884c\u3002<\/li>\n
    •  UPDATE<\/strong>\uff1a\u66f4\u65b0\u73b0\u6709\u884c\u3002<\/li>\n
    •  DELETE<\/strong>\uff1a\u5220\u9664\u73b0\u6709\u884c\u3002<\/li>\n<\/ul>\n
      \u89e6\u53d1\u5668\u4e3b\u4f53<\/strong><\/p>\n
      \u89e6\u53d1\u5668\u4e3b\u4f53\u5305\u542b\u89e6\u53d1\u5668\u903b\u8f91\uff0c\u53ef\u4ee5\u5305\u62ecSQL\u8bed\u53e5\u3001PL\/SQL\u4ee3\u7801\u6216\u5176\u4ed6\u89e6\u53d1\u5668\u3002<\/p>\n
      \u793a\u4f8b<\/strong><\/p>\n
      \u521b\u5efa\u4e00\u4e2a\u5728\u5411\u540d\u4e3acustomers\u7684\u8868\u63d2\u5165\u65b0\u884c\u4e4b\u524d\u9a8c\u8bc1\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u7684BEFORE\u89e6\u53d1\u5668\uff1a<\/p>\n
      CREATE TRIGGER validate_email_before_insert \nBEFORE \nINSTEAD OF \nINSERT ON customers\nFOR EACH ROW\nAS\nDECLARE\n  email VARCHAR(255);\nBEGIN\n  SELECT email INTO email FROM NEW;\n  IF email NOT LIKE '%@%' THEN\n    RAISE_APPLICATION_ERROR(-20001, 'Invalid email address');\n  END IF;\nEND;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u6ce8\u610f\uff1a<\/strong><\/p>\n
        \n
      • \u89e6\u53d1\u5668\u540d\u79f0\u5fc5\u987b\u552f\u4e00\u3002<\/li>\n
      • \u89e6\u53d1\u5668\u5fc5\u987b\u5bf9\u8868\u5177\u6709\u8db3\u591f\u7684\u6743\u9650\u3002<\/li>\n
      • \u89e6\u53d1\u5668\u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\uff0c\u4f46\u9012\u5f52\u89e6\u53d1\u5668\u4f1a\u5bfc\u81f4\u9519\u8bef\u3002<\/li>\n
      • \u89e6\u53d1\u5668\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\uff0c\u56e0\u6b64\u5e94\u8c28\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u89e6\u53d1\u5668\u600e\u4e48\u505a\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":"
        \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5141\u8bb8\u5728insert\u3001update\u6216delete\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u3002\u521b\u5efa\u89e6\u53d1\u5668\uff1a\u4f7f\u7528create trigger\u8bed\u53e5\uff0c\u6307\u5b9a\u89e6\u53d1\u5668\u540d\u79f0\u3001\u4e8b\u4ef6\u7c7b\u578b\u3001\u8868\u540d\u548c\u89e6\u53d1\u5668\u903b\u8f91\u3002\u89e6\u53d1\u5668\u7c7b\u578b\uff1a\u53ef\u9009\u62e9before\uff08\u4e8b\u4ef6\u524d\u6267\u884c\uff09\u3001after\uff08\u4e8b\u4ef6\u540e\u6267\u884c\uff09\u6216instead of\uff08\u53d6\u4ee3\u4e8b\u4ef6\uff09\u3002\u89e6\u53d1\u5668\u4e8b\u4ef6\uff1a\u5305\u62ecinsert\uff08\u63d2\u5165\uff09\u3001update\uff08\u66f4\u65b0\uff09\u548cdelete\uff08\u5220\u9664\uff09\u3002\u89e6\u53d1\u5668\u4e3b\u4f53\uff1a\u5305\u542b\u89e6\u53d1\u5668\u903b\u8f91\uff0c\u53ef\u5305\u62ecsql\u3001pl\/sql\u6216\u5176\u4ed6\u89e6\u53d1\u5668\u3002 Oracle\u89e6\u53d1\u5668\u521b\u5efa\u6307\u5357 \u89e6\u53d1\u5668\u662f\u4ec0\u4e48\uff1f \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5b83\u5141\u8bb8\u4f60\u5728\u6570\u636e\u5e93\u4e8b\u4ef6\uff08\u5982INSERT\u3001UPDATE\u6216DELETE\u64cd\u4f5c\uff09\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u3002 \u521b\u5efa\u89e6\u53d1\u5668 \u8981\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8bed\u53e5CREATE TRIGGER\u3002\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a CREATE TRIGGER trigger_name BEFORE\/AFTER [INSTEAD OF] event_type ON table_name FOR EACH ROW AS — \u89e6\u53d1\u5668\u903b\u8f91 \u767b\u5f55\u540e\u590d\u5236 \u89e6\u53d1\u5668\u7c7b\u578b BEFORE\u89e6\u53d1\u5668\uff1a\u5728\u4e8b\u4ef6\u53d1\u751f\u4e4b\u524d\u6267\u884c\u3002 AFTER\u89e6\u53d1\u5668\uff1a\u5728\u4e8b\u4ef6\u53d1\u751f\u4e4b\u540e\u6267\u884c\u3002 INSTEAD OF\u89e6\u53d1\u5668\uff1a\u53d6\u4ee3\u4e8b\u4ef6\u672c\u8eab\u7684\u6267\u884c\uff0c\u6267\u884c\u89e6\u53d1\u5668\u903b\u8f91\u3002 \u89e6\u53d1\u5668\u4e8b\u4ef6 INSERT\uff1a\u63d2\u5165\u65b0\u884c\u3002 UPDATE\uff1a\u66f4\u65b0\u73b0\u6709\u884c\u3002 DELETE\uff1a\u5220\u9664\u73b0\u6709\u884c\u3002 \u89e6\u53d1\u5668\u4e3b\u4f53 \u89e6\u53d1\u5668\u4e3b\u4f53\u5305\u542b\u89e6\u53d1\u5668\u903b\u8f91\uff0c\u53ef\u4ee5\u5305\u62ecSQL\u8bed\u53e5\u3001PL\/SQL\u4ee3\u7801\u6216\u5176\u4ed6\u89e6\u53d1\u5668\u3002 \u793a\u4f8b \u521b\u5efa\u4e00\u4e2a\u5728\u5411\u540d\u4e3acustomers\u7684\u8868\u63d2\u5165\u65b0\u884c\u4e4b\u524d\u9a8c\u8bc1\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u7684BEFORE\u89e6\u53d1\u5668\uff1a CREATE TRIGGER validate_email_before_insert BEFORE INSTEAD OF INSERT ON customers FOR EACH ROW AS DECLARE email VARCHAR(255); BEGIN […]<\/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-5005","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5005","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=5005"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5005\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}