Oracle® OLAP DML Reference 11g Release 1 (11.1) B2812603 


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The LOG function computes the logarithm of an expression.
Note:
Do not confuse the LOGfunction with the function of the same name whichcreates a log file..DECIMAL
LOG([base,] expression)
The base by which to compute the logarithm. When you do not specify a value, the function computes the natural logarithm of the expression by using e for the base where e is equal to 2.718281828459
.
A numeric expression which is greater than zero. When the value is equal to or less than zero, LOG returns an NA
value.