A mathematical function that returns the absolute (positive) value of the specified numeric expression.
The following example shows the results of using the
ABS function on three different numbers.
SELECT ABS(-1.0), ABS(0.0), ABS(1.0)
Here is the result set.
---- ---- ---- 1.0 .0 1.0
ABS function can produce an overflow error when the absolute value of a number is greater than the largest number that can be represented by the specified data type. For example, the
int data type can hold only values that range from
2,147,483,647. Computing the absolute value for the signed integer
2,147,483,648 causes an overflow error because its absolute value is greater than the positive range for the int data type.
DECLARE @i int; SET @i = -2147483648; SELECT ABS(@i); GO
Here is the error message:
"Msg 8115, Level 16, State 2, Line 3"
"Arithmetic overflow error converting expression to data type int."