MySQL LN() Function

Return the natural logarithm of 2:

SELECT LN(2);

Definition and Usage

The LN() function returns the natural logarithm of a number.

Note: See also the LOG() and EXP() functions.

LN(number)

Parameter	Description
number	Required. A number. Must be greater than 0

Works in:	From MySQL 4.0

Return the natural logarithm of 1:

SELECT LN(1);