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-= (Subtraction 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

Subtracts two numbers and sets a value to the result of the operation. For example, if a variable @x equals 35, then @x -= 2 takes the original value of @x, subtracts 2 and sets @x to that new value (33).

Syntax

expression -= expression

Arguments

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

Result Types

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

Remarks

For more information, see - (Subtraction) (Transact-SQL).

See Also

Compound Operators (Transact-SQL)
Expressions (Transact-SQL)
Operators (Transact-SQL)