{"id":5741,"date":"2024-11-14T12:18:00","date_gmt":"2024-11-14T04:18:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5741\/"},"modified":"2024-11-14T12:18:00","modified_gmt":"2024-11-14T04:18:00","slug":"oracle%e6%80%8e%e4%b9%88%e5%88%9b%e5%bb%ba%e8%a7%a6%e5%8f%91%e5%99%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5741\/","title":{"rendered":"oracle\u600e\u4e48\u521b\u5efa\u89e6\u53d1\u5668"},"content":{"rendered":"

\n oracle \u4e2d\u7684\u89e6\u53d1\u5668\u662f\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u7684 sql \u4ee3\u7801\uff0c\u7528\u4e8e\u6570\u636e\u64cd\u4f5c\u8bed\u8a00 (dml) \u64cd\u4f5c\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u3002\u521b\u5efa\u89e6\u53d1\u5668\u7684\u8bed\u6cd5\u4e3a\uff1acreate trigger [\u89e6\u53d1\u5668\u540d\u79f0] before\/after [\u89e6\u53d1\u4e8b\u4ef6] on [\u8868\u540d\u79f0] as [\u89e6\u53d1\u5668\u4ee3\u7801]\u3002\u89e6\u53d1\u5668\u4e8b\u4ef6\u5305\u62ec\uff1abefore insert\u3001after insert\u3001before update\u3001after update\u3001before delete\u3001after delete\u3002\u89e6\u53d1\u5668\u4ee3\u7801\u6307\u5b9a\u5728\u89e6\u53d1\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u7684 sql \u8bed\u53e5\uff0c\n<\/p><\/blockquote>\n

\"oracle\u600e\u4e48\u521b\u5efa\u89e6\u53d1\u5668\u63d2\u56fe\"<\/p>\n

\u4f7f\u7528 Oracle \u521b\u5efa\u89e6\u53d1\u5668<\/h2>\n

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

\u89e6\u53d1\u5668\u662f\u4e00\u6bb5 SQL \u4ee3\u7801\uff0c\u5b83\u5728\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u3002\u8fd9\u4e9b\u4e8b\u4ef6\u53ef\u80fd\u662f\u6570\u636e\u64cd\u4f5c\u8bed\u8a00 (DML) \u64cd\u4f5c\uff0c\u4f8b\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002<\/p>\n

\u5982\u4f55\u521b\u5efa\u89e6\u53d1\u5668<\/strong><\/p>\n

\u5728 Oracle \u4e2d\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

CREATE TRIGGER [\u89e6\u53d1\u5668\u540d\u79f0]\nBEFORE\/AFTER [\u89e6\u53d1\u4e8b\u4ef6] ON [\u8868\u540d\u79f0]\nAS\n[\u89e6\u53d1\u5668\u4ee3\u7801]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u89e6\u53d1\u5668\u4e8b\u4ef6<\/strong><\/p>\n
\u89e6\u53d1\u4e8b\u4ef6\u6307\u5b9a\u89e6\u53d1\u5668\u5c06\u5728\u4f55\u65f6\u89e6\u53d1\u3002\u53ef\u80fd\u7684\u89e6\u53d1\u4e8b\u4ef6\u5305\u62ec\uff1a<\/p>\n
    \n
  •  BEFORE INSERT<\/strong>\uff1a\u5728\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u884c\u4e4b\u524d<\/li>\n
  •  AFTER INSERT<\/strong>\uff1a\u5728\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u884c\u4e4b\u540e<\/li>\n
  •  BEFORE UPDATE<\/strong>\uff1a\u5728\u66f4\u65b0\u8868\u4e2d\u7684\u73b0\u6709\u884c\u4e4b\u524d<\/li>\n
  •  AFTER UPDATE<\/strong>\uff1a\u5728\u66f4\u65b0\u8868\u4e2d\u7684\u73b0\u6709\u884c\u4e4b\u540e<\/li>\n
  •  BEFORE DELETE<\/strong>\uff1a\u5728\u4ece\u8868\u4e2d\u5220\u9664\u884c\u4e4b\u524d<\/li>\n
  •  AFTER DELETE<\/strong>\uff1a\u5728\u4ece\u8868\u4e2d\u5220\u9664\u884c\u4e4b\u540e<\/li>\n<\/ul>\n
    \u89e6\u53d1\u5668\u4ee3\u7801<\/strong><\/p>\n
    \u89e6\u53d1\u5668\u4ee3\u7801\u5305\u542b\u5c06\u89e6\u53d1\u5668\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u7684 SQL \u8bed\u53e5\u3002\u5b83\u53ef\u4ee5\u6267\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u4f8b\u5982\uff1a<\/p>\n
      \n
    • \u9a8c\u8bc1\u6570\u636e\u8f93\u5165<\/li>\n
    • \u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027<\/li>\n
    • \u8ddf\u8e2a\u6570\u636e\u66f4\u6539<\/li>\n
    • \u53d1\u9001\u901a\u77e5<\/li>\n<\/ul>\n
      \u793a\u4f8b<\/strong><\/p>\n
      \u4ee5\u4e0b\u793a\u4f8b\u521b\u5efa\u4e00\u4e2a\u5728\u5411 EMPLOYEES<\/strong> \u8868\u4e2d\u63d2\u5165\u65b0\u884c\u4e4b\u524d\u9a8c\u8bc1\u5de5\u8d44\u7684\u89e6\u53d1\u5668\uff1a<\/p>\n
      CREATE TRIGGER check_salary\nBEFORE INSERT ON EMPLOYEES\nAS\nBEGIN\n  IF NEW.salary < 10000\n  THEN\n    RAISE_APPLICATION_ERROR(-20001, '\u5de5\u8d44\u4e0d\u80fd\u4f4e\u4e8e 10000');\n  END IF;\nEND;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u89e6\u53d1\u5668\u7684\u4f5c\u7528<\/strong><\/p>\n
      \u89e6\u53d1\u5668\u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\uff1a<\/p>\n
        \n
      • \u5f3a\u5236\u6267\u884c\u4e1a\u52a1\u89c4\u5219<\/li>\n
      • \u7ef4\u62a4\u6570\u636e\u4e00\u81f4\u6027<\/li>\n
      • \u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd<\/li>\n
      • \u7b80\u5316\u590d\u6742\u6570\u636e\u5e93\u64cd\u4f5c<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u521b\u5efa\u89e6\u53d1\u5668\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 \u4e2d\u7684\u89e6\u53d1\u5668\u662f\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u7684 sql \u4ee3\u7801\uff0c\u7528\u4e8e\u6570\u636e\u64cd\u4f5c\u8bed\u8a00 (dml) \u64cd\u4f5c\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u3002\u521b\u5efa\u89e6\u53d1\u5668\u7684\u8bed\u6cd5\u4e3a\uff1acreate trigger [\u89e6\u53d1\u5668\u540d\u79f0] before\/after [\u89e6\u53d1\u4e8b\u4ef6] on [\u8868\u540d\u79f0] as [\u89e6\u53d1\u5668\u4ee3\u7801]\u3002\u89e6\u53d1\u5668\u4e8b\u4ef6\u5305\u62ec\uff1abefore insert\u3001after insert\u3001before update\u3001after update\u3001before delete\u3001after delete\u3002\u89e6\u53d1\u5668\u4ee3\u7801\u6307\u5b9a\u5728\u89e6\u53d1\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u7684 sql \u8bed\u53e5\uff0c \u4f7f\u7528 Oracle \u521b\u5efa\u89e6\u53d1\u5668 \u4ec0\u4e48\u662f\u89e6\u53d1\u5668\uff1f \u89e6\u53d1\u5668\u662f\u4e00\u6bb5 SQL \u4ee3\u7801\uff0c\u5b83\u5728\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u3002\u8fd9\u4e9b\u4e8b\u4ef6\u53ef\u80fd\u662f\u6570\u636e\u64cd\u4f5c\u8bed\u8a00 (DML) \u64cd\u4f5c\uff0c\u4f8b\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002 \u5982\u4f55\u521b\u5efa\u89e6\u53d1\u5668 \u5728 Oracle \u4e2d\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a CREATE TRIGGER [\u89e6\u53d1\u5668\u540d\u79f0] BEFORE\/AFTER [\u89e6\u53d1\u4e8b\u4ef6] ON [\u8868\u540d\u79f0] AS [\u89e6\u53d1\u5668\u4ee3\u7801] \u767b\u5f55\u540e\u590d\u5236 \u89e6\u53d1\u5668\u4e8b\u4ef6 \u89e6\u53d1\u4e8b\u4ef6\u6307\u5b9a\u89e6\u53d1\u5668\u5c06\u5728\u4f55\u65f6\u89e6\u53d1\u3002\u53ef\u80fd\u7684\u89e6\u53d1\u4e8b\u4ef6\u5305\u62ec\uff1a BEFORE INSERT\uff1a\u5728\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u884c\u4e4b\u524d AFTER INSERT\uff1a\u5728\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u884c\u4e4b\u540e BEFORE […]<\/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-5741","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5741","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=5741"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5741\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}