由于外键约束无法删除数据

1.如何显示行号SQL Server2008

http://jingyan.baidu.com/article/295430f1c48f9e0c7f005040.html




2.解除约束

DELETE FROM Students

报错如下：



要解决这个，就必须先找到和Students 有约束关系的表

SELECT *
FROM sys.foreign_keys
WHERE referenced_object_id=object_id('Students')
ORDER BY 1查询结果：



ALTER TABLE Scores
DROP CONSTRAINT FK_Scores_Students

然后再删除表就可以了，如果想让表的ID重新从1开始自增长
truncate table Students

最后再把刚刚的外键约束加回来
ALTER TABLE [dbo].[Scores] ADD CONSTRAINT [FK_Scores_Students] FOREIGN KEY([studentId])
REFERENCES [dbo].[Students] ([id])
GO