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constraints

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sandhyarao49
Starting Member

4 Posts

Posted - 2008-10-05 : 20:15:33

Hi,

I have a small doubt.

How to check the constraints(and constraints logic) defined on a particular table.

Thanks,
Sandhya

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-10-06 : 00:26:23

sp_help tablename will give you all constraint defined on table along with column details.

or use

select * from sys.objects o
left join  sys.key_constraints kc  on kc.parent_object_id = o.object_id
left join sys.check_constraints cc on cc.parent_object_id = o.object_id
left join sys.default_constraints dc on dc.parent_object_id = o.object_id
left join sys.foreign_keys fk on fk.parent_object_id = o.object_id
where OBJECT_NAME(o.object_id)=yourtablename

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-10-06 : 01:25:16

or use information_schema views

select ccu.COLUMN_NAME,ccu.CONSTRAINT_NAME,rc.CONSTRAINT_TYPE from information_schema.constraint_column_usage ccu
INNER JOIN information_schema.TABLE_CONSTRAINTS  rc
ON rc.CONSTRAINT_NAME=ccu.CONSTRAINT_NAME
where ccu.table_name='YourTableName'

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