ABS returns the absolute value of n.
This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. The function returns the same datatype as the numeric datatype of the argument.
See Also:
Table 2-10, "Implicit Type Conversion Matrix" for more information on implicit conversionThe following example returns the absolute value of -15:
SELECT ABS(-15) "Absolute" FROM DUAL;
Absolute
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15