sqlserver 刪除表 外鍵

Truncate table Menu --truncate不能對有外鍵的表 
delete Menu
delete RoleMenu

SELECT * FROM sys.foreign_keys
WHERE referenced_object_id=OBJECT_ID('Menu'); --找到引用該表主鍵的名稱


ALTER TABLE dbo.RoleMenu DROP constraint FK_Menu_MenuId   --刪除外鍵