TABLE CONSTRAINTS

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TABLE_CONSTRAINTS identifies all constraints defined in a database.

TABLE_CONSTRAINTS

Column name	Data type	Length	Description
CONSTRAINT_NAME	CHAR	67	Unique name for the constraint; nullable
TABLE_NAME	CHAR	67	Table for which the constraint is defined; nullable
CONSTRAINT_TYPE	CHAR	11	Possible values are UNIQUE, PRIMARY KEY, FOREIGN KEY, and CHECK; nullable
IS_DEFERRABLE	CHAR	3	Reserved for future use; always set to No; nullable
INITIALLY_DEFERRED	CHAR	3	Reserved for future use; always set to No; nullable

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