{"id":5352,"date":"2024-11-14T10:49:38","date_gmt":"2024-11-14T02:49:38","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5352\/"},"modified":"2024-11-14T10:49:38","modified_gmt":"2024-11-14T02:49:38","slug":"oracle%e6%80%8e%e4%b9%88%e4%bd%bf%e7%94%a8%e8%a7%a6%e5%8f%91%e5%99%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5352\/","title":{"rendered":"oracle\u600e\u4e48\u4f7f\u7528\u89e6\u53d1\u5668"},"content":{"rendered":"

\n oracle \u4e2d\u7684\u89e6\u53d1\u5668\u662f\u7528\u4e8e\u5728\u7279\u5b9a\u4e8b\u4ef6(\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664)\u89e6\u53d1\u540e\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u7684\u5b58\u50a8\u8fc7\u7a0b\u3002\u5b83\u4eec\u7528\u4e8e\u5404\u79cd\u573a\u666f\uff0c\u5305\u62ec\u6570\u636e\u9a8c\u8bc1\u3001\u5ba1\u6838\u548c\u6570\u636e\u7ef4\u62a4\u3002\u521b\u5efa\u89e6\u53d1\u5668\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u89e6\u53d1\u5668\u540d\u79f0\u3001\u5173\u8054\u8868\u3001\u89e6\u53d1\u4e8b\u4ef6\u548c\u89e6\u53d1\u65f6\u95f4\u3002\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u89e6\u53d1\u5668\uff1abefore \u89e6\u53d1\u5668\u5728\u64cd\u4f5c\u4e4b\u524d\u89e6\u53d1\uff0c\u800c after \u89e6\u53d1\u5668\u5728\u64cd\u4f5c\u4e4b\u540e\u89e6\u53d1\u3002\u4f8b\u5982\uff0cbefore insert \u89e6\u53d1\u5668\u53ef\u786e\u4fdd\u63d2\u5165\u884c\u7684\u5e74\u9f84\u5217\u4e0d\u4e3a\u8d1f\u3002\n<\/p><\/blockquote>\n

\"oracle\u600e\u4e48\u4f7f\u7528\u89e6\u53d1\u5668\u63d2\u56fe\"<\/p>\n

Oracle \u4e2d\u4f7f\u7528\u89e6\u53d1\u5668\u7684\u6307\u5357<\/strong><\/p>\n

\u89e6\u53d1\u5668\u662f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u7684\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5f53\u89e6\u53d1\u5176\u5173\u8054\u4e8b\u4ef6\uff08\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u65f6\u81ea\u52a8\u6267\u884c\u3002\u5b83\u4eec\u7528\u4e8e\u5728\u6570\u636e\u64cd\u4f5c\u4e2d\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u4f8b\u5982\u5f3a\u5236\u6267\u884c\u4e1a\u52a1\u89c4\u5219\u3001\u8fdb\u884c\u5ba1\u6838\u6216\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n

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

\u8981\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

CREATE TRIGGER [trigger_name]\nON [table_name]\nFOR [trigger_event] [trigger_timing]\nAS\nBEGIN\n  -- \u89e6\u53d1\u5668\u4ee3\u7801\nEND;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
trigger_name\uff1a<\/strong>\u89e6\u53d1\u5668\u7684\u552f\u4e00\u540d\u79f0\u3002
table_name\uff1a<\/strong>\u89e6\u53d1\u5668\u5173\u8054\u7684\u8868\u540d\u3002
trigger_event\uff1a<\/strong>\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u4e8b\u4ef6\uff0c\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002
trigger_timing\uff1a<\/strong>\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u65f6\u95f4\uff0c\u5982 BEFORE \u6216 AFTER\u3002<\/p>\n
\u89e6\u53d1\u5668\u7c7b\u578b<\/strong><\/p>\n
\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u89e6\u53d1\u5668\uff1a<\/p>\n
    \n
  •  BEFORE \u89e6\u53d1\u5668\uff1a<\/strong>\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u524d\u89e6\u53d1\u3002<\/li>\n
  •  AFTER \u89e6\u53d1\u5668\uff1a<\/strong>\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u540e\u89e6\u53d1\u3002<\/li>\n<\/ul>\n
    \u89e6\u53d1\u5668\u793a\u4f8b<\/strong><\/p>\n
    \u521b\u5efa\u4e00\u4e2a BEFORE INSERT \u89e6\u53d1\u5668\u6765\u786e\u4fdd\u63d2\u5165\u884c\u7684 “age” \u5217\u4e0d\u4e3a\u8d1f\uff1a<\/p>\n
    CREATE TRIGGER check_age_insert\nON employees\nBEFORE INSERT\nAS\nBEGIN\n  IF NEW.age < 0 THEN\n    RAISE_APPLICATION_ERROR(-20001, 'Age cannot be negative');\n  END IF;\nEND;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u89e6\u53d1\u5668\u7528\u6cd5<\/strong><\/p>\n
    \u89e6\u53d1\u5668\u5728\u4ee5\u4e0b\u573a\u666f\u4e2d\u5f88\u6709\u7528\uff1a<\/p>\n
      \n
    •  \u6570\u636e\u9a8c\u8bc1\uff1a<\/strong>\u786e\u4fdd\u6570\u636e\u7b26\u5408\u4e1a\u52a1\u89c4\u5219\u3002<\/li>\n
    •  \u5ba1\u6838\uff1a<\/strong>\u8bb0\u5f55\u5bf9\u6570\u636e\u7684\u64cd\u4f5c\u3002<\/li>\n
    •  \u6570\u636e\u7ef4\u62a4\uff1a<\/strong>\u5728\u6267\u884c\u6570\u636e\u64cd\u4f5c\u65f6\u81ea\u52a8\u6267\u884c\u7ef4\u62a4\u4efb\u52a1\uff0c\u4f8b\u5982\u66f4\u65b0\u5f15\u7528\u8868\u3002<\/li>\n
    •  \u7ea7\u8054\u66f4\u65b0\uff1a<\/strong>\u81ea\u52a8\u4f20\u64ad\u5bf9\u7236\u8868\u7684\u66f4\u6539\u5230\u5b50\u8868\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u4f7f\u7528\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\u7528\u4e8e\u5728\u7279\u5b9a\u4e8b\u4ef6(\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664)\u89e6\u53d1\u540e\u81ea\u52a8\u6267\u884c\u64cd\u4f5c\u7684\u5b58\u50a8\u8fc7\u7a0b\u3002\u5b83\u4eec\u7528\u4e8e\u5404\u79cd\u573a\u666f\uff0c\u5305\u62ec\u6570\u636e\u9a8c\u8bc1\u3001\u5ba1\u6838\u548c\u6570\u636e\u7ef4\u62a4\u3002\u521b\u5efa\u89e6\u53d1\u5668\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u89e6\u53d1\u5668\u540d\u79f0\u3001\u5173\u8054\u8868\u3001\u89e6\u53d1\u4e8b\u4ef6\u548c\u89e6\u53d1\u65f6\u95f4\u3002\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u89e6\u53d1\u5668\uff1abefore \u89e6\u53d1\u5668\u5728\u64cd\u4f5c\u4e4b\u524d\u89e6\u53d1\uff0c\u800c after \u89e6\u53d1\u5668\u5728\u64cd\u4f5c\u4e4b\u540e\u89e6\u53d1\u3002\u4f8b\u5982\uff0cbefore insert \u89e6\u53d1\u5668\u53ef\u786e\u4fdd\u63d2\u5165\u884c\u7684\u5e74\u9f84\u5217\u4e0d\u4e3a\u8d1f\u3002 Oracle \u4e2d\u4f7f\u7528\u89e6\u53d1\u5668\u7684\u6307\u5357 \u89e6\u53d1\u5668\u662f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u7684\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5f53\u89e6\u53d1\u5176\u5173\u8054\u4e8b\u4ef6\uff08\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u65f6\u81ea\u52a8\u6267\u884c\u3002\u5b83\u4eec\u7528\u4e8e\u5728\u6570\u636e\u64cd\u4f5c\u4e2d\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u4f8b\u5982\u5f3a\u5236\u6267\u884c\u4e1a\u52a1\u89c4\u5219\u3001\u8fdb\u884c\u5ba1\u6838\u6216\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\u3002 \u521b\u5efa\u89e6\u53d1\u5668 \u8981\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a CREATE TRIGGER [trigger_name] ON [table_name] FOR [trigger_event] [trigger_timing] AS BEGIN — \u89e6\u53d1\u5668\u4ee3\u7801 END; \u767b\u5f55\u540e\u590d\u5236 trigger_name\uff1a\u89e6\u53d1\u5668\u7684\u552f\u4e00\u540d\u79f0\u3002table_name\uff1a\u89e6\u53d1\u5668\u5173\u8054\u7684\u8868\u540d\u3002trigger_event\uff1a\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u4e8b\u4ef6\uff0c\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002trigger_timing\uff1a\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u65f6\u95f4\uff0c\u5982 BEFORE \u6216 AFTER\u3002 \u89e6\u53d1\u5668\u7c7b\u578b \u6709\u4e24\u79cd\u7c7b\u578b\u7684\u89e6\u53d1\u5668\uff1a BEFORE \u89e6\u53d1\u5668\uff1a\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u524d\u89e6\u53d1\u3002 AFTER \u89e6\u53d1\u5668\uff1a\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u540e\u89e6\u53d1\u3002 \u89e6\u53d1\u5668\u793a\u4f8b \u521b\u5efa\u4e00\u4e2a BEFORE INSERT \u89e6\u53d1\u5668\u6765\u786e\u4fdd\u63d2\u5165\u884c\u7684 “age” \u5217\u4e0d\u4e3a\u8d1f\uff1a CREATE TRIGGER check_age_insert ON employees BEFORE INSERT AS 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-5352","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5352","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=5352"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5352\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}