SQL Server 清除表TRUNCATE TABLE 提示： 因为该表正由 FOREIGN KEY 约束引用

https://blog.csdn.net/dengguawei0519/article/details/101315699

1。找到引用这个表外键名称 

SELECT * FROM sys.foreign_keys
WHERE referenced_object_id=OBJECT_ID('User');

删除外键 删除掉引用表的外键

ALTER TABLE dbo.XX DROP constraint FK_User_XX