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delete-check-constraints.md

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title Delete Check Constraints
description Delete Check Constraints
author WilliamDAssafMSFT
ms.author wiassaf
ms.date 06/28/2017
ms.service sql
ms.subservice table-view-index
ms.topic how-to
ms.custom
ignite-2025
helpviewer_keywords
removing constraints
CHECK constraints, deleting
constraints [SQL Server], deleting
constraints [SQL Server], check
deleting constraints
monikerRange =azuresqldb-current || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric-sqldb

Delete Check Constraints

[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]

You can delete a check constraint in [!INCLUDEssnoversion] by using [!INCLUDEssManStudioFull] or [!INCLUDEtsql]. Deleting check constraints removes the limitations on data values that are accepted in the column or columns included in the constraint expression.

In This Topic

Before You Begin

Security

Permissions

Requires ALTER permission on the table.

Using SQL Server Management Studio

To delete a check constraint

  1. In Object Explorer, expand the table with the check constraint.

  2. Expand Constraints.

  3. Right-click the constraint and click Delete.

  4. In the Delete Object dialog box, click OK.

Using Transact-SQL

To delete a check constraint

  1. In Object Explorer, connect to an instance of [!INCLUDEssDE].

  2. On the Standard bar, click New Query.

  3. Copy and paste the following example into the query window and click Execute.

    ALTER TABLE dbo.DocExc   
DROP CONSTRAINT CHK_ColumnD_DocExc;  
GO

For more information, see ALTER TABLE (Transact-SQL).