{"id":94500,"date":"2024-10-19T19:17:17","date_gmt":"2024-10-19T11:17:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94500\/"},"modified":"2024-10-19T19:17:17","modified_gmt":"2024-10-19T11:17:17","slug":"oracle-trigger%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94500\/","title":{"rendered":"Oracle Trigger\u89f8\u767c\u5668\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5"},"content":{"rendered":"<h1 id=\"oracle-trigger%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-ITNJwuldOY\">Oracle Trigger\u89f8\u767c\u5668\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u89f8\u767c\u5668\uff08Trigger\uff09\u662f\u4e00\u7a2e\u81ea\u52d5\u57f7\u884c\u7684\u7a0b\u5e8f\uff0c\u7576\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\uff09\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u57f7\u884c\u9810\u5b9a\u7fa9\u7684\u52d5\u4f5c\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u89f8\u767c\u5668\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8cc7\u6599\u5eab\u5c64\u9762\u4e0a\u5be6\u73fe\u8907\u96dc\u7684\u696d\u52d9\u908f\u8f2f\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u89f8\u767c\u5668\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5\uff0c\u5305\u62ec\u5176\u985e\u578b\u3001\u8a9e\u6cd5\u3001\u4f7f\u7528\u5834\u666f\u53ca\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e9%a1%9e%e5%9e%8b-ITNJwuldOY\">\u89f8\u767c\u5668\u7684\u985e\u578b<\/h2>\n<p>Oracle\u4e2d\u7684\u89f8\u767c\u5668\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u884c\u7d1a\u89f8\u767c\u5668\uff08Row-level Trigger\uff09<\/strong>\uff1a\u5728\u5c0d\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u9032\u884c\u64cd\u4f5c\u6642\u89f8\u767c\uff0c\u9069\u5408\u9700\u8981\u5c0d\u6bcf\u4e00\u884c\u6578\u64da\u9032\u884c\u8655\u7406\u7684\u60c5\u6cc1\u3002<\/li>\n<li><strong>\u8a9e\u53e5\u7d1a\u89f8\u767c\u5668\uff08Statement-level Trigger\uff09<\/strong>\uff1a\u5728\u5c0d\u8868\u9032\u884c\u64cd\u4f5c\u6642\u89f8\u767c\u4e00\u6b21\uff0c\u7121\u8ad6\u5f71\u97ff\u4e86\u591a\u5c11\u884c\uff0c\u9069\u5408\u9700\u8981\u5728\u6574\u9ad4\u64cd\u4f5c\u4e2d\u57f7\u884c\u7684\u60c5\u6cc1\u3002<\/li>\n<li><strong>BEFORE\u89f8\u767c\u5668<\/strong>\uff1a\u5728\u57f7\u884cINSERT\u3001UPDATE\u6216DELETE\u64cd\u4f5c\u4e4b\u524d\u89f8\u767c\uff0c\u9069\u5408\u7528\u65bc\u6578\u64da\u9a57\u8b49\u6216\u4fee\u6539\u5373\u5c07\u63d2\u5165\u7684\u6578\u64da\u3002<\/li>\n<li><strong>AFTER\u89f8\u767c\u5668<\/strong>\uff1a\u5728\u57f7\u884cINSERT\u3001UPDATE\u6216DELETE\u64cd\u4f5c\u4e4b\u5f8c\u89f8\u767c\uff0c\u9069\u5408\u7528\u65bc\u8a18\u9304\u65e5\u8a8c\u6216\u66f4\u65b0\u5176\u4ed6\u8868\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e8%aa%9e%e6%b3%95-ITNJwuldOY\">\u89f8\u767c\u5668\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5275\u5efa\u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE [OR REPLACE] TRIGGER trigger_name\n    {BEFORE | AFTER} {INSERT | UPDATE | DELETE} ON table_name\n    [FOR EACH ROW]\n    DECLARE\n        -- \u8b8a\u6578\u8072\u660e\n    BEGIN\n        -- \u89f8\u767c\u5668\u908f\u8f2f\n    END;<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5275\u5efa\u4e00\u500b\u5728\u63d2\u5165\u65b0\u8a18\u9304\u4e4b\u524d\u6aa2\u67e5\u6578\u64da\u7684BEFORE\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>CREATE OR REPLACE TRIGGER check_salary\nBEFORE INSERT ON employees\nFOR EACH ROW\nBEGIN\n    IF :new.salary &lt; 0 THEN\n        RAISE_APPLICATION_ERROR(-20001, '\u85aa\u6c34\u4e0d\u80fd\u70ba\u8ca0\u6578');\n    END IF;\nEND;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-ITNJwuldOY\">\u4f7f\u7528\u5834\u666f<\/h2>\n<p>\u89f8\u767c\u5668\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u4f5c\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u9a57\u8b49<\/strong>\uff1a\u5728\u6578\u64da\u63d2\u5165\u6216\u66f4\u65b0\u4e4b\u524d\u9032\u884c\u9a57\u8b49\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u81ea\u52d5\u8a08\u7b97<\/strong>\uff1a\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u81ea\u52d5\u8a08\u7b97\u4e26\u66f4\u65b0\u5176\u4ed6\u5b57\u6bb5\u7684\u503c\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u8a18\u9304<\/strong>\uff1a\u5728\u6578\u64da\u8b8a\u66f4\u6642\u81ea\u52d5\u8a18\u9304\u64cd\u4f5c\u65e5\u8a8c\uff0c\u4fbf\u65bc\u8ffd\u8e64\u548c\u5be9\u8a08\u3002<\/li>\n<li><strong>\u8907\u88fd\u6578\u64da<\/strong>\uff1a\u5728\u4e00\u500b\u8868\u4e2d\u63d2\u5165\u6578\u64da\u6642\uff0c\u81ea\u52d5\u5c07\u6578\u64da\u8907\u88fd\u5230\u53e6\u4e00\u500b\u8868\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ITNJwuldOY\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u89f8\u767c\u5668\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u5f71\u97ff<\/strong>\uff1a\u904e\u591a\u7684\u89f8\u767c\u5668\u53ef\u80fd\u6703\u5f71\u97ff\u8cc7\u6599\u5eab\u6027\u80fd\uff0c\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li><strong>\u8abf\u8a66\u56f0\u96e3<\/strong>\uff1a\u89f8\u767c\u5668\u7684\u908f\u8f2f\u53ef\u80fd\u6703\u4f7f\u5f97\u932f\u8aa4\u6392\u67e5\u8b8a\u5f97\u56f0\u96e3\uff0c\u5efa\u8b70\u5728\u958b\u767c\u904e\u7a0b\u4e2d\u9032\u884c\u5145\u5206\u6e2c\u8a66\u3002<\/li>\n<li><strong>\u5faa\u74b0\u89f8\u767c<\/strong>\uff1a\u907f\u514d\u89f8\u767c\u5668\u4e4b\u9593\u76f8\u4e92\u8abf\u7528\uff0c\u5c0e\u81f4\u7121\u9650\u5faa\u74b0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ITNJwuldOY\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u89f8\u767c\u5668\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8cc7\u6599\u5eab\u5c64\u9762\u4e0a\u5be6\u73fe\u81ea\u52d5\u5316\u548c\u6578\u64da\u5b8c\u6574\u6027\u3002\u6b63\u78ba\u4f7f\u7528\u89f8\u767c\u5668\u80fd\u5920\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u7dad\u8b77\u6027\uff0c\u4f46\u540c\u6642\u4e5f\u9700\u8981\u8b39\u614e\u8003\u616e\u5176\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\u3002\u4e86\u89e3\u89f8\u767c\u5668\u7684\u985e\u578b\u3001\u8a9e\u6cd5\u53ca\u4f7f\u7528\u5834\u666f\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u5229\u7528\u9019\u4e00\u529f\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u53ca<em><a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a><\/em>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle Trigger\u89f8\u767c\u5668\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u81ea\u52d5\u5316\u7ba1\u7406\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-94500","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94500","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=94500"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94500\/revisions"}],"predecessor-version":[{"id":94501,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94500\/revisions\/94501"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}