close-master-key-transact-sql.md

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CLOSE MASTER KEY (Transact-SQL)	CLOSE MASTER KEY (Transact-SQL)	VanMSFT	vanto	05/15/2017	sql	t-sql	reference	CLOSE MASTER KEY CLOSE_MASTER_KEY_TSQL	encryption [SQL Server], Database Master Key CLOSE MASTER KEY statement database master key [SQL Server], closing cryptography [SQL Server], Database Master Key closing Database Master Keys	TSQL	>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

CLOSE MASTER KEY (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw]

Closes the master key of the current database.

:::image type="icon" source="../../includes/media/topic-link-icon.svg" border="false"::: Transact-SQL syntax conventions

Syntax

CLOSE MASTER KEY  

Note

[!INCLUDEsynapse-analytics-od-unsupported-syntax]

[!INCLUDEsql-server-tsql-previous-offline-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 AdventureWorks2022;  
CLOSE MASTER KEY;  
GO  

Examples: [!INCLUDEssazuresynapse-md] and [!INCLUDEssPDW]

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