多个触发器对一个表具有相同的操作时间和事件mysql错误

我是触发器新手，并且收到“一张表的多个触发器具有相同的操作时间和事件”错误。

我创建了一个更新后和删除后，这是两个单独的操作时间/事件，所以我不太确定为什么会收到错误。

这是我的查询：

CREATE TRIGGER `new_enrolment` AFTER INSERT ON `mdl_user_enrolments` FOR EACH ROW BEGIN
INSERT INTO c_master (
ud,
firstname,
lastname,
email,
username,
cid,
course
)
SELECT 
mdl_user.id AS uid, 
mdl_user.firstname, 
mdl_user.lastname, 
mdl_user.email, 
mdl_user.suspended, 
mdl_user.username, 
mdl_enrol.courseid AS cid,
mdl_course.fullname AS course
FROM mdl_user_enrolments INNER JOIN mdl_enrol ON mdl_user_enrolments.enrolid = mdl_enrol.id
 INNER JOIN mdl_course ON mdl_enrol.courseid = mdl_course.id
 INNER JOIN mdl_user ON mdl_user.id = mdl_user_enrolments.userid
WHERE userid = NEW.userid;
END;

CREATE TRIGGER `remove_enrolment` AFTER DELETE ON `mdl_user_enrolments` FOR EACH ROW BEGIN
SELECT mdl_enrol.courseid, 
mdl_user_enrolments.userid, 
mdl_user_enrolments.enrolid
FROM mdl_user_enrolments INNER JOIN mdl_enrol ON mdl_user_enrolments.enrolid = mdl_enrol.id
WHERE mdl_user_enrolments.enrolid = OLD.enrolid

DELETE FROM c_master
WHERE uid = OLD.userid AND mdl_enrol.courseid;
END;

因为我对这一切都是新手，所以我可能错过了一些简单的东西。

Brian，您可能已经在表中多次添加和删除相同的触发器，而您忘记了上次在再次创建它之前删除它。确保在再次创建之前已将其删除

DROP TRIGGER [IF EXISTS] [schema_name.]trigger_name

and then

CREATE TRIGGER ....

文档here http://dev.mysql.com/doc/refman/5.0/en/drop-trigger.html.