Question

user表的id为teacher表的外键（外键关联）父表插入一条数据，子表也插入一条数据，却报错外键是空的？

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Answer 1

建议你写个存储过程,我写的一个,让你参考一下!CardNo是自定义的数据类型!用触发器容易出错
CREATE PROCEDURE DelFixUser
@CardNo CardNo
AS
Declare @CarNo CarNo
select @CarNo=车辆号码 from FixCardIndexTable
where 卡号=@CardNo
Delete from AllCardIndexTable
where 卡号=@CardNo
Delete from FixCardIndexTable
where 卡号=@CardNo
Delete from FixCardEndDateTable
where 卡号=@CardNo
Delete from CardPassWordTable
where 卡号=@CardNo
Delete from UserCarInfoTable
where 车辆牌号=@CarNo
说明：删除一个固定用户记录，同时从AllCardIndexTable、FixCardIndexTable、FixCardEndDateTable、CardPassWordTable和UserCarInfoTable表中删除相应的记录。