-= (Subtract EQUALS) (Transact-SQL)

SQL Server 2012

SQL Server 2014
SQL Server 2008 R2
SQL Server 2008

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 - (Subtract) (Transact-SQL).

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