CLOSE MASTER KEY (Transact-SQL)

Applies to: yesSQL Server (all supported versions) YesAzure SQL Database YesAzure SQL Managed Instance yesAzure Synapse Analytics yesParallel Data Warehouse

Closes the master key of the current database.

Topic link icon Transact-SQL Syntax Conventions

Syntax

CLOSE MASTER KEY  

Note

This syntax is not supported by serverless SQL pool in Azure Synapse Analytics.

Note

To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.

Arguments

Takes no arguments.

Remarks

This statement reverses the operation performed by OPEN MASTER KEY. CLOSE MASTER KEY only succeeds when the database master key was opened in the current session by using the OPEN MASTER KEY statement.

Permissions

No permissions are required.

Examples

USE AdventureWorks2012;  
CLOSE MASTER KEY;  
GO  

Examples: Azure Synapse Analytics and Parallel Data Warehouse

USE master;  
OPEN MASTER KEY DECRYPTION BY PASSWORD = '43987hkhj4325tsku7';  
GO   
CLOSE MASTER KEY;  
GO  

See Also

CREATE MASTER KEY (Transact-SQL)
OPEN MASTER KEY (Transact-SQL)
Encryption Hierarchy