| title | -= (Subtraction Assignment) (Transact-SQL) | |||||
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| description | Subtracts two numbers and sets a value to the result of the operation. | |||||
| author | rwestMSFT | |||||
| ms.author | randolphwest | |||||
| ms.date | 07/15/2025 | |||||
| ms.service | sql | |||||
| ms.subservice | t-sql | |||||
| ms.topic | reference | |||||
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| monikerRange | >=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric || =fabric-sqldb |
[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw-fabricsqldb]
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).
expression - = expression
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.
For more information, see - (Subtraction).