SYSCOLUMNCONSTRAINTS

Purpose

Description of the constraints for a table’s columns

See Also

CONSTRAINTS, DATA TYPES, SELECT, SYSTEM TABLES

Description

System Tables are system defined read-only tables. You can query these tables using the SELECT statement.

Column	Data Type	Width	Description
TABLE_CAT	C	30	Table catalog
TABLE_SCHEM	C	30	Table schema
TABLE_NAME	C	30	Table name
COLUMN_NAME	C	32	Column name
CONSTRAINT_NAME	C	30	Constraint Name (see below)
CONSTRAINT	C	100	Constraint

Constraint names:

• AUTOINC NEXT
• AUTOINC STEP
• CALCULATED
• CHECK
• CHOICES
• DEFAULT
• ERROR
• HELP
• NOT NULL
• NULL SUPPORT
• PICTURE
• RANGE
• RECALCULATE
• WHEN

Example

SELECT column_name;
  FROM syscolumnconstraints;
  WHERE table_name = 'example'