sp_helpconstraint (T-SQL)

Returns a list of all constraint types, their user-defined or system-supplied name, the columns on which they have been defined, and the expression that defines the constraint (for DEFAULT and CHECK constraints only).

Syntax

sp_helpconstraint [@objname =] 'table'
    [,[@nomsg =] 'no_message']

Arguments

[@objname =] 'table'

Is the table about which constraint information is returned. The table specified must be local to the current database. table is nvarchar(776), with no default.

[@nomsg =] 'no_message'

Is an optional parameter that prints the table name. no_message is varchar(5), with a default of msg. nomsg suppresses the printing.

Return Code Values

0 (success) or 1 (failure)

Result Sets

None

Remarks

Executing sp_help table reports all information about the specified table. To see only the constraint information, use sp_helpconstraint.

Permissions

Execute permissions default to the public role.

Examples

This example shows all constraints for the authors table.

USE pubs

EXEC sp_helpconstraint authors

See Also