启用或禁用外键约束的语句

--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