sp_helpconstraint
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
sp_helpconstraint displays a descending indexed column if it participated in primary keys. The descending indexed column will be listed in the result set with a minus sign (-) following its name. The default, an ascending indexed column, will be listed by its name alone.
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