问题
I did not create the database I'm working with, but I would like to see the details of a check constraint.
I know a check constraint on a column is enforcing a set of specific values, and I'd like to know what those values are. For example, if a check constraint is enforcing the character 'Y' and 'N', I want to be able to query the database and see that the accepted values are 'Y' and 'N.'
Is this possible to do through a query?
回答1:
select constraint_name,search_condition
from all_constraints
where table_name='NAME_OF_YOUR_TABLE'
and constraint_type='C';
Will list the check and the constraint name of all check constraints on a specific table.
回答2:
Don't forget that the columns in the all_constraints table are case-sensitive. If your select statement returns nothing, that may be why.
(If I had enough rep to comment, on DBA's answer, this would go there.)
来源：https://stackoverflow.com/questions/2686353/how-to-see-contents-of-check-constraint-on-oracle