1. SQL Language Reference
  2. Functions
  3. LOG

LOG

Syntax

Description of log.eps follows
Description of the illustration log.eps

Purpose

LOG returns the logarithm, base n2, of n1. The base n2 can be any positive value other than 0 or 1 and n1 can be any positive value.

This function takes as arguments any numeric data type or any nonnumeric data type that can be implicitly converted to a numeric data type. If any argument is BINARY_FLOAT or BINARY_DOUBLE, then the function returns BINARY_DOUBLE. Otherwise the function returns NUMBER.

See Also:

Table 2-8 for more information on implicit conversion

Examples

The following example returns the log of 100:

SELECT LOG(10,100) "Log base 10 of 100"
  FROM DUAL;

Log base 10 of 100
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