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PK, FK, UK µÄ½Å±¾°¢

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SQL code:
--ÅúÁ¿Çå³ý±íÄÚÈÝ£º

--1.½ûÓÃÍâ¼üÔ¼Êø
DECLARE c1 cursor for
select 'alter table ['+ object_name(parent_obj) + '] nocheck constraint ['+name+']; '
from sysobjects
where xtype = 'F'
open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1
while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1
--2.Çå³ý±íÄÚÈÝ
DECLARE c2 cursor for
select 'truncate table ['+name +']; '
from sysobjects
where xtype = 'u'
open c2
declare @c2 varchar(8000)
fetch next from c2 into @c2
while(@@fetch_status=0)
begin
exec(@c2)
fetch next from c2 into @c2
end
close c2
deallocate c2
--3.ÆôÓÃÍâ¼üÔ¼Êø
DECLARE c1 cursor for
select 'alter table ['+ object_name(parent_obj) + '] check constraint ['+name+']; '
from sysobjects
where xtype = 'F'
open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1
while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1



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