Re: Finding Not Null Constraints

John Hough wrote:
>
> Can anyone give me a sql query that will distinguish between not null
> constraints and column check constraints.
>
> Both are constraint_type of 'C' and since the search_condition field
> is a "LONG" type we have been unable to utilize it in a where clause.

   NOT NULL constraint is a kind of check constraint.    You can query all check constraints by using

   SELECT constraint_name from user_constraints where constraint_type like 'C%';

   To distinguish with other check constraints, you can search the SEARCH_CONDITION    column.

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Name   : Lun Wing San (Certified Oracle Database Administrator)

Title  : Oracle Database Administrator and System Administrator of QRC
Phone  : (852)27885841

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