锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#22269;&#20135;&#31934;&#21697;&#20037;&#20037;&#20037;&#20037;&#44;&#31934;&#21697;&#26085;&#38889;&#57;&#57;&#20122;&#27954;&#30340;&#22312;&#32447;&#21457;&#24067;&#44;&#20122;&#27954;&#26085;&#38889;&#31934;&#21697;&#26080;&#30721;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#13;</title><link>http://m.tkk7.com/RomulusW/category/48533.html</link><description>鈥斺�旂敓鍛戒笉姝紝濂嬫枟涓嶆伅銆?/description><language>zh-cn</language><lastBuildDate>Fri, 24 Nov 2017 07:16:55 GMT</lastBuildDate><pubDate>Fri, 24 Nov 2017 07:16:55 GMT</pubDate><ttl>60</ttl><item><title>mysql 瑙﹀彂鍣?/title><link>http://m.tkk7.com/RomulusW/archive/2017/11/24/432918.html</link><dc:creator>W.R</dc:creator><author>W.R</author><pubDate>Fri, 24 Nov 2017 06:33:00 GMT</pubDate><guid>http://m.tkk7.com/RomulusW/archive/2017/11/24/432918.html</guid><wfw:comment>http://m.tkk7.com/RomulusW/comments/432918.html</wfw:comment><comments>http://m.tkk7.com/RomulusW/archive/2017/11/24/432918.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/RomulusW/comments/commentRss/432918.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/RomulusW/services/trackbacks/432918.html</trackback:ping><description><![CDATA[涓�銆佽Е鍙戝櫒姒傚康

       瑙﹀彂鍣紙trigger錛夛細(xì)鐩戣鏌愮鎯呭喌錛屽茍瑙﹀彂鏌愮鎿嶄綔錛屽畠鏄彁渚涚粰紼嬪簭鍛樺拰鏁版嵁鍒嗘瀽鍛樻潵淇濊瘉鏁版嵁瀹屾暣鎬х殑涓�縐嶆柟娉曪紝瀹冩槸涓庤〃浜嬩歡鐩稿叧鐨勭壒孌婄殑瀛樺偍榪囩▼錛屽畠鐨勬墽琛屼笉鏄敱紼嬪簭璋冪敤錛屼篃涓嶆槸鎵嬪伐鍚姩錛岃�屾槸鐢變簨浠舵潵瑙﹀彂錛屼緥濡傚綋瀵逛竴涓〃榪涜鎿嶄綔錛?insert錛宒elete錛?update錛夋椂灝變細(xì)嬋�媧誨畠鎵ц銆?
        瑙﹀彂鍣ㄧ粡甯哥敤浜庡姞寮烘暟鎹殑瀹屾暣鎬х害鏉熷拰涓氬姟瑙勫垯絳夈�?瑙﹀彂鍣ㄥ垱寤鴻娉曞洓瑕佺礌錛?
        1.鐩戣鍦扮偣(table)
        2.鐩戣浜嬩歡(insert/update/delete)
        3.瑙﹀彂鏃墮棿(after/before)
        4.瑙﹀彂浜嬩歡(insert/update/delete)
瑙﹀彂鍣ㄥ熀鏈娉曞涓嬫墍紺猴細(xì)
DROP TRIGGER if EXISTS 瑙﹀彂鍣ㄥ悕;
CREATE TRIGGER 瑙﹀彂鍣ㄥ悕 BEFORE INSERT ON 琛ㄥ悕 
FOR EACH ROW 
BEGIN
   sql璇彞
END

 鍏朵腑錛?trigger_time鏄Е鍙戝櫒鐨勮Е鍙戜簨浠訛紝鍙互涓篵efore錛堝湪媯�鏌ョ害鏉熷墠瑙﹀彂錛夋垨after錛堝湪媯�鏌ョ害鏉熷悗瑙﹀彂錛夛紱
          trigger_event鏄Е鍙戝櫒鐨勮Е鍙戜簨浠訛紝鍖呮嫭insert銆乽pdate鍜宒elete錛岄渶娉ㄦ剰瀵瑰悓涓�涓〃鐩稿悓瑙﹀彂鏃墮棿鐨勭浉鍚岃Е鍙戜簨浠訛紝鍙兘瀹氫箟涓�涓Е鍙戝櫒錛?
          鍙互浣跨敤old鍜宯ew鏉ュ紩鐢ㄨЕ鍙戝櫒涓彂鐢熷彉鍖栫殑璁板綍鍐呭銆?
  瑙﹀彂鍣⊿QL璇硶錛?

DROP TRIGGER if EXISTS triggle_insert_enroll_students;
CREATE TRIGGER triggle_insert_enroll_students AFTER INSERT ON t_course_enroll_students 
FOR EACH ROW BEGIN
-- update t_course_enroll_students set pid=(select id from t_course_enroll where t_course_enroll.course_name=t_course_enroll_students.course_name) where id=t_course_enroll_students.id; 	
	set new.pid=(select id from t_course_enroll where t_course_enroll.course_name=new.course_name);
		
END<img src ="http://m.tkk7.com/RomulusW/aggbug/432918.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/RomulusW/" target="_blank">W.R</a> 2017-11-24 14:33 <a href="http://m.tkk7.com/RomulusW/archive/2017/11/24/432918.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>            <footer>
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