| description | sp_helpconstraint (Transact-SQL) | ||
|---|---|---|---|
| title | sp_helpconstraint (Transact-SQL) | Microsoft Docs | ||
| ms.custom | |||
| ms.date | 03/14/2017 | ||
| ms.service | sql | ||
| ms.reviewer | |||
| ms.subservice | system-objects | ||
| ms.topic | reference | ||
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| ms.assetid | 29d6cd36-535d-4765-bca8-62f9d9886ff5 | ||
| author | markingmyname | ||
| ms.author | maghan | ||
| monikerRange | =azuresqldb-current||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current |
[!INCLUDE SQL Server SQL MI]
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).
Transact-SQL Syntax Conventions
sp_helpconstraint [ @objname = ] 'table'
[ , [ @nomsg = ] 'no_message' ]
[ @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.
0 (success) or 1 (failure)
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.
Executing sp_helptable reports all information about the specified table. To see only the constraint information, use sp_helpconstraint.
Requires membership in the public role.
The following example shows all constraints for the Product table.
USE AdventureWorks2012;
GO
EXEC sp_helpconstraint 'Production.Product';
Database Engine Stored Procedures (Transact-SQL)
ALTER TABLE (Transact-SQL)
CREATE TABLE (Transact-SQL)
sp_help (Transact-SQL)
System Stored Procedures (Transact-SQL)
sys.key_constraints (Transact-SQL)
sys.check_constraints (Transact-SQL)
sys.default_constraints (Transact-SQL)