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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
此觸發器的要點是採取客戶端的簽入時間並將其放入Schedule表格的列中,該列表告訴管理員客戶什麼時候出現。觸發錯誤:SQL錯誤(1193):未知的系統變量'Showedup'