LN

Syntax

LN( number )

Description

Returns the natural logarithm of the number number. Returns 'NULL' if the number is less than or equal to 0.

Argument types:

• number — Fractional number | Integer

Return type: Fractional number

Examples

LN(1) = 0.0

LN(EXP(2)) = 2.0

Data source support

ClickHouse 19.13, Microsoft SQL Server 2017 (14.0), MySQL 5.6, PostgreSQL 9.3.