&= (Bitwise AND EQUALS) (Transact-SQL)
Applies To: SQL Server 2014, SQL Server 2016 Preview
Performs a bitwise logical AND operation between two integer values, and sets a value to the result of the operation.
Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database, Azure SQL Data Warehouse Public Preview.
Is any valid expression of any one of the data types in the numeric category except the bit data type.
Returns the data type of the argument with the higher precedence. For more information, see Data Type Precedence (Transact-SQL).