add-equals-transact-sql.md

title	+= (Addition Assignment) (Transact-SQL) | Microsoft Docs
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+= (Addition Assignment) (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all_md]

Adds 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, add 2 and sets @x to that new value (37).

Transact-SQL Syntax Conventions

Syntax

expression += expression  

Arguments

expression
Is any valid expression of any data type 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 + (Addition) (Transact-SQL).

See Also

Compound Operators (Transact-SQL)
Expressions (Transact-SQL)
Operators (Transact-SQL)
+= (String Concatenation Assignment) (Transact-SQL)