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title &= (Bitwise AND assignment) (Transact-SQL)
description Performs a bitwise logical AND operation between two integer values, and sets a value to the result of the operation.
author rwestMSFT
ms.author randolphwest
ms.date 04/25/2024
ms.service sql
ms.subservice t-sql
ms.topic reference
ms.custom
ignite-2025
f1_keywords
&=
&=_TSQL
helpviewer_keywords
compound operators, &=
assignment operators, &=
augmented operators, &=
&= (bitwise AND equals)
dev_langs
TSQL
monikerRange >=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric || =fabric-sqldb

&= (Bitwise AND assignment) (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw-fabricsqldb]

Performs a bitwise logical AND operation between two integer values, and sets a value to the result of the operation.

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

Syntax

expression &= expression

Arguments

expression

Any valid expression of any one of the data types in the numeric category, except the bit data type.

Return types

Returns the data type of the argument with the higher precedence. For more information, see Data type precedence (Transact-SQL).

Remarks

The &= operator is shorthand for using the = and & operators. The following two queries are equivalent.

-- &= operator
DECLARE @bitwise INT = 1;
SET @bitwise &= 1;
SELECT @bitwise;
GO

-- = and & operators
DECLARE @bitwise INT = 1;
SET @bitwise = @bitwise & 1;
SELECT @bitwise;
GO

Both examples return a result of 1.

For more information, see & (Bitwise AND) (Transact-SQL).

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