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LOG

Calculates the logarithm of an expression using a specified base.

SYNTAX

LOG ( expression , [ , base ] ) 

expression

A numeric expression (a constant, field name, or expression whose value is numeric) of which you want the logarithm.

base

A numeric expression that is the base you want to use. If you do not specify a base, LOG returns the natural logarithm, base (e). The base must be greater than 1. If applied to a negative number or zero, LOG produces an UNKNOWN value.

EXAMPLE

To determine the natural log of 7.3891, create the field LOG(7.3891), which returns a value of 2.0000. To determine the log base 10 of 8 times 12, create the field LOG(8 * 12, 10), which returns a value of 1.98227.


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