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

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Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric

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

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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