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CREATE TRIGGER `ScheduleCheckin` AFTER INSERT ON `Checkins` FOR EACH ROW BEGIN
SET SCHEDULE.Showedup = CHECKINS.CheckInDateTime,
Where SCHEDULE.MemberID = CHECKINS.MemberID;
END
此触发器的要点是采取客户端的签入时间并将其放入Schedule表格的列中,该列表告诉管理员客户什么时候出现。触发错误:SQL错误(1193):未知的系统变量'Showedup'