{"id":164007,"date":"2024-11-05T04:15:31","date_gmt":"2024-11-04T20:15:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164007\/"},"modified":"2024-11-05T04:15:32","modified_gmt":"2024-11-04T20:15:32","slug":"%e8%a7%a3%e6%9e%90oracle%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164007\/","title":{"rendered":"\u89e3\u6790Oracle\u89f8\u767c\u5668\u7684\u8a9e\u6cd5"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%9e%90oracle%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e8%aa%9e%e6%b3%95-XuumGyzoGy\">\u89e3\u6790Oracle\u89f8\u767c\u5668\u7684\u8a9e\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u89f8\u767c\u5668\uff08Trigger\uff09\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5132\u5b58\u7a0b\u5e8f\uff0c\u5b83\u6703\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\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\u64cd\u4f5c\u4e2d\u5be6\u73fe\u81ea\u52d5\u5316\u548c\u6578\u64da\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u89f8\u767c\u5668\u7684\u8a9e\u6cd5\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%aforacle%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%9f-XuumGyzoGy\">\u4ec0\u9ebc\u662fOracle\u89f8\u767c\u5668\uff1f<\/h2>\n<p>Oracle\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u8207\u8cc7\u6599\u8868\u76f8\u95dc\u806f\u7684\u7a0b\u5e8f\uff0c\u7576\u5c0d\u8a72\u8cc7\u6599\u8868\u57f7\u884cINSERT\u3001UPDATE\u6216DELETE\u7b49\u64cd\u4f5c\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u88ab\u6fc0\u6d3b\u3002\u89f8\u767c\u5668\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u6578\u64da\u9a57\u8b49\u3001\u8a18\u9304\u8b8a\u66f4\u3001\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u7b49\u4efb\u52d9\u3002<\/p>\n<h2 id=\"oracle%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-XuumGyzoGy\">Oracle\u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>Oracle\u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nCREATE [OR REPLACE] TRIGGER trigger_name\n{BEFORE | AFTER | INSTEAD OF} \n{INSERT | UPDATE | DELETE} \nON table_name\n[FOR EACH ROW]\nDECLARE\n   -- \u8b8a\u6578\u5ba3\u544a\u5340\nBEGIN\n   -- \u89f8\u767c\u5668\u908f\u8f2f\nEND;\n<\/code><\/pre>\n<h3 id=\"%e8%aa%9e%e6%b3%95%e8%a7%a3%e6%9e%90-XuumGyzoGy\">\u8a9e\u6cd5\u89e3\u6790<\/h3>\n<ul>\n<li><strong>CREATE [OR REPLACE] TRIGGER trigger_name<\/strong>\uff1a\u7528\u65bc\u5275\u5efa\u4e00\u500b\u65b0\u7684\u89f8\u767c\u5668\uff0c\u6216\u66ff\u63db\u5df2\u5b58\u5728\u7684\u89f8\u767c\u5668\u3002<\/li>\n<li><strong>BEFORE | AFTER | INSTEAD OF<\/strong>\uff1a\u6307\u5b9a\u89f8\u767c\u5668\u7684\u57f7\u884c\u6642\u6a5f\u3002BEFORE\u8868\u793a\u5728\u64cd\u4f5c\u4e4b\u524d\u57f7\u884c\uff0cAFTER\u8868\u793a\u5728\u64cd\u4f5c\u4e4b\u5f8c\u57f7\u884c\uff0cINSTEAD OF\u5247\u7528\u65bc\u8996\u5716\uff0c\u8868\u793a\u66ff\u4ee3\u539f\u6709\u64cd\u4f5c\u3002<\/li>\n<li><strong>INSERT | UPDATE | DELETE<\/strong>\uff1a\u6307\u5b9a\u89f8\u767c\u5668\u97ff\u61c9\u7684\u64cd\u4f5c\u985e\u578b\u3002<\/li>\n<li><strong>ON table_name<\/strong>\uff1a\u6307\u5b9a\u89f8\u767c\u5668\u6240\u95dc\u806f\u7684\u8cc7\u6599\u8868\u3002<\/li>\n<li><strong>FOR EACH ROW<\/strong>\uff1a\u53ef\u9078\u9805\uff0c\u8868\u793a\u5c0d\u6bcf\u4e00\u884c\u6578\u64da\u8b8a\u66f4\u90fd\u57f7\u884c\u89f8\u767c\u5668\u908f\u8f2f\u3002<\/li>\n<li><strong>DECLARE<\/strong>\uff1a\u53ef\u9078\u9805\uff0c\u7528\u65bc\u5ba3\u544a\u8b8a\u6578\u3002<\/li>\n<li><strong>BEGIN &#8230; END;<\/strong>\uff1a\u89f8\u767c\u5668\u7684\u4e3b\u9ad4\uff0c\u5305\u542b\u8981\u57f7\u884c\u7684\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e7%af%84%e4%be%8b-XuumGyzoGy\">\u89f8\u767c\u5668\u7684\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u89f8\u767c\u5668\u7bc4\u4f8b\uff0c\u7576\u5c0d\u67d0\u500b\u54e1\u5de5\u8cc7\u6599\u8868\u9032\u884c\u63d2\u5165\u64cd\u4f5c\u6642\uff0c\u81ea\u52d5\u8a18\u9304\u7576\u524d\u6642\u9593\uff1a<\/p>\n<pre><code>\nCREATE OR REPLACE TRIGGER trg_before_insert\nBEFORE INSERT ON employees\nFOR EACH ROW\nBEGIN\n   :new.created_at := SYSDATE;\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u7576\u6709\u65b0\u54e1\u5de5\u8cc7\u6599\u63d2\u5165\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u5c07\u7576\u524d\u6642\u9593\uff08SYSDATE\uff09\u8ce6\u503c\u7d66\u65b0\u54e1\u5de5\u7684created_at\u6b04\u4f4d\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-XuumGyzoGy\">\u89f8\u767c\u5668\u7684\u512a\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-XuumGyzoGy\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u81ea\u52d5\u5316\uff1a\u89f8\u767c\u5668\u53ef\u4ee5\u81ea\u52d5\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u6e1b\u5c11\u624b\u52d5\u5e72\u9810\u3002<\/li>\n<li>\u6578\u64da\u5b8c\u6574\u6027\uff1a\u53ef\u4ee5\u5728\u6578\u64da\u8b8a\u66f4\u6642\u9032\u884c\u9a57\u8b49\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<li>\u5be9\u8a08\uff1a\u53ef\u4ee5\u7528\u65bc\u8a18\u9304\u6578\u64da\u8b8a\u66f4\u7684\u6b77\u53f2\uff0c\u4fbf\u65bc\u5f8c\u7e8c\u67e5\u8a62\u548c\u5be9\u8a08\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-XuumGyzoGy\">\u7f3a\u9ede<\/h3>\n<ul>\n<li>\u6027\u80fd\u5f71\u97ff\uff1a\u904e\u591a\u7684\u89f8\u767c\u5668\u53ef\u80fd\u6703\u5f71\u97ff\u8cc7\u6599\u5eab\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9ad8\u983b\u7387\u7684\u6578\u64da\u64cd\u4f5c\u4e2d\u3002<\/li>\n<li>\u8abf\u8a66\u56f0\u96e3\uff1a\u89f8\u767c\u5668\u7684\u908f\u8f2f\u53ef\u80fd\u6703\u96b1\u85cf\u5728\u8cc7\u6599\u5eab\u5c64\uff0c\u8abf\u8a66\u548c\u7dad\u8b77\u76f8\u5c0d\u56f0\u96e3\u3002<\/li>\n<li>\u8907\u96dc\u6027\uff1a\u904e\u65bc\u8907\u96dc\u7684\u89f8\u767c\u5668\u908f\u8f2f\u53ef\u80fd\u6703\u5c0e\u81f4\u610f\u5916\u7684\u884c\u70ba\uff0c\u589e\u52a0\u7cfb\u7d71\u7684\u8907\u96dc\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-XuumGyzoGy\">\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\u81ea\u52d5\u5316\u6578\u64da\u64cd\u4f5c\u548c\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u3002\u900f\u904e\u6b63\u78ba\u7684\u4f7f\u7528\u89f8\u767c\u5668\uff0c\u53ef\u4ee5\u63d0\u9ad8\u8cc7\u6599\u5eab\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002\u7136\u800c\uff0c\u958b\u767c\u8005\u5728\u4f7f\u7528\u89f8\u767c\u5668\u6642\u4e5f\u9700\u8b39\u614e\u8003\u91cf\u5176\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\u53ca\u7dad\u8b77\u7684\u8907\u96dc\u6027\u3002\u82e5\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u8cc7\u6599\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790Oracle\u89f8\u767c\u5668\u7684\u8a9e\u6cd5\uff0c\u4e86\u89e3\u5176\u7d50\u69cb\u3001\u529f\u80fd\u53ca\u61c9\u7528\uff0c\u52a9\u60a8\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u4e8b\u4ef6\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-164007","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164007","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=164007"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164007\/revisions"}],"predecessor-version":[{"id":164008,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164007\/revisions\/164008"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}