sql - How To get the Check Rule Constraint -


how can expression of check constraint?

with mssms can easly see table person has check constraint named ck_person validating expression ([dateofbirth]<[dateofdeath]).

with query can column_name, constraint_name , constraint_type:

select ccu.column_name, ccu.constraint_name,  tc.constraint_type     information_schema.table_constraints tc     inner join information_schema.constraint_column_usage ccu on tc.constraint_name = ccu.constraint_name     tc.table_name = 'person'

resulting

+-------------+-----------------+-----------------+ | column_name | constraint_name | constraint_type | +-------------+-----------------+-----------------+ | personid    | pk_person       | primary key     | | dateofbirth | ck_person       | check           | | dateofdeath | ck_person       | check           | +-------------+-----------------+-----------------+

but how can actual expression itself?

try this...

select definition check_expression       ,name       constraintname sys.check_constraints parent_object_id = object_id('tablename')

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