SQL Server 临时禁用和启用所有外键约束

--获得禁用所有外键约束的语句
select  'ALTER TABLE ['  + b.name +  '] NOCHECK CONSTRAINT ' +  a.name +';' as  禁用约束
from  sysobjects  a ,sysobjects  b
where  a.xtype ='f' and  a.parent_obj = b.id

--获得启用所有外键约束的语句
select  'ALTER TABLE [' + b.name +  '] CHECK CONSTRAINT ' +  a.name +';' as  启用约束
from  sysobjects  a ,sysobjects  b
where  a.xtype ='f' and  a.parent_obj = b.id