Difference between revisions of "SYSCOLUMNCONSTRAINTS"
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==See Also== | ==See Also== | ||
| − | [[SQL Constraints| | + | [[SQL Constraints|CONSTRAINTS]], [[SQL Data Types|DATA TYPES]], [[SQL SELECT|SELECT]], [[SQL System Tables|SYSTEM TABLES]] |
==Description== | ==Description== | ||
Latest revision as of 11:05, 11 February 2013
Contents
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'
