{"id":15929,"date":"2023-12-04T23:48:22","date_gmt":"2023-12-04T15:48:22","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15929"},"modified":"2023-12-05T00:10:49","modified_gmt":"2023-12-04T16:10:49","slug":"oracle-zhong-plsql-zhong-de-chu-fa-qi-shi-shen-me","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-plsql-zhong-de-chu-fa-qi-shi-shen-me\/","title":{"rendered":"Oracle \u4e2d PLSQL \u4e2d\u7684\u89e6\u53d1\u5668\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0cPL\/SQL \u89e6\u53d1\u5668\uff08PL\/SQL Triggers\uff09\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b83\u4e0e\u6570\u636e\u5e93\u8868\u76f8\u5173\u8054\uff0c\u6839\u636e\u8868\u7684\u67d0\u4e9b\u4e8b\u4ef6\uff08\u4f8b\u5982 INSERT\u3001UPDATE\u3001DELETE\uff09\u81ea\u52a8\u89e6\u53d1\u6267\u884c\u3002\u89e6\u53d1\u5668\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\u81ea\u52a8\u6267\u884c\u4e00\u4e9b\u9884\u5b9a\u4e49\u7684 PL\/SQL \u4ee3\u7801\u3002<\/p>\n<p>PL\/SQL \u89e6\u53d1\u5668\u5206\u4e3a\u4e24\u7c7b\uff1a<\/p>\n<ol>\n<li><strong>\u884c\u7ea7\u89e6\u53d1\u5668\uff08Row-level Triggers\uff09\uff1a<\/strong>\n<ul>\n<li>\u884c\u7ea7\u89e6\u53d1\u5668\u4e0e\u8868\u7684\u6bcf\u4e00\u884c\u7684\u64cd\u4f5c\u76f8\u5173\u8054\uff0c\u5f53\u8868\u4e2d\u7684\u4e00\u884c\u88ab\u63d2\u5165\uff08INSERT\uff09\u3001\u66f4\u65b0\uff08UPDATE\uff09\u6216\u5220\u9664\uff08DELETE\uff09\u65f6\u89e6\u53d1\u3002<\/li>\n<li>Oracle \u652f\u6301 <code>BEFORE<\/code> \u548c <code>AFTER<\/code> \u7c7b\u578b\u7684\u884c\u7ea7\u89e6\u53d1\u5668\uff0c\u5206\u522b\u5728\u6570\u636e\u4fee\u6539\u524d\u548c\u6570\u636e\u4fee\u6539\u540e\u89e6\u53d1\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-plsql  line-numbers\">CREATE OR REPLACE TRIGGER trigger_name\n[BEFORE | AFTER] INSERT OR UPDATE OR DELETE ON table_name\nFOR EACH ROW\nBEGIN\n -- PL\/SQL code here\nEND;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8bed\u53e5\u7ea7\u89e6\u53d1\u5668\uff08Statement-level Triggers\uff09\uff1a<\/strong>\n<ul>\n<li>\u8bed\u53e5\u7ea7\u89e6\u53d1\u5668\u4e0e\u8868\u7684\u6574\u4f53\u64cd\u4f5c\u76f8\u5173\u8054\uff0c\u5f53\u6267\u884c SQL \u8bed\u53e5\uff08\u4f8b\u5982 INSERT\u3001UPDATE\u3001DELETE\uff09\u65f6\u89e6\u53d1\u3002<\/li>\n<li>\u8bed\u53e5\u7ea7\u89e6\u53d1\u5668\u53ea\u6267\u884c\u4e00\u6b21\uff0c\u800c\u4e0d\u662f\u9488\u5bf9\u6bcf\u4e00\u884c\u6267\u884c\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-plsql  line-numbers\">CREATE OR REPLACE TRIGGER trigger_name\n[BEFORE | AFTER] INSERT OR UPDATE OR DELETE ON table_name\nBEGIN\n -- PL\/SQL code here\nEND;\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u89e6\u53d1\u5668\u5e38\u7528\u4e8e\u4ee5\u4e0b\u573a\u666f\uff1a<\/p>\n<ul>\n<li>\u6570\u636e\u5b8c\u6574\u6027\u548c\u7ea6\u675f\uff1a\u786e\u4fdd\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664\u64cd\u4f5c\u6ee1\u8db3\u9884\u5b9a\u4e49\u7684\u6761\u4ef6\u3002<\/li>\n<li>\u65e5\u5fd7\u8bb0\u5f55\uff1a\u8bb0\u5f55\u6570\u636e\u53d8\u66f4\u7684\u5386\u53f2\u4fe1\u606f\u3002<\/li>\n<li>\u81ea\u52a8\u5316\u4e1a\u52a1\u903b\u8f91\uff1a\u5728\u6570\u636e\u53d1\u751f\u53d8\u66f4\u65f6\u6267\u884c\u81ea\u5b9a\u4e49\u7684\u4e1a\u52a1\u903b\u8f91\u3002<\/li>\n<\/ul>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fc7\u5ea6\u4f7f\u7528\u89e6\u53d1\u5668\u53ef\u80fd\u5bfc\u81f4\u590d\u6742\u6027\u589e\u52a0\uff0c\u6027\u80fd\u4e0b\u964d\uff0c\u5e76\u4e14\u53ef\u80fd\u5f15\u53d1\u7ef4\u62a4\u548c\u8c03\u8bd5\u7684\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u548c\u4f7f\u7528\u89e6\u53d1\u5668\u65f6\uff0c\u5e94\u8be5\u8c28\u614e\u8003\u8651\u5176\u5bf9\u7cfb\u7edf\u7684\u5f71\u54cd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0cPL\/SQL \u89e6\u53d1\u5668\uff08PL\/SQL Triggers\uff09\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b83\u4e0e\u6570\u636e [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15929","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15929"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15929\/revisions"}],"predecessor-version":[{"id":15931,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15929\/revisions\/15931"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15929"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}