Information Schema TABLE_CONSTRAINTS Table
The Information Schema TABLE_CONSTRAINTS table contains information about tables that have constraints.
It has the following columns:
| Column | Description |
|---|---|
CONSTRAINT_CATALOG | Always def. |
CONSTRAINT_SCHEMA | Database name containing the constraint. |
CONSTRAINT_NAME | Constraint name. |
TABLE_SCHEMA | Database name. |
TABLE_NAME | Table name. |
CONSTRAINT_TYPE | Type of constraint; one of UNIQUE, PRIMARY KEY, FOREIGN KEY or CHECK. |
The REFERENTIAL_CONSTRAINTS table has more information about foreign keys.
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