LN

SyntaxSyntax

LN( number )

DescriptionDescription

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

ExamplesExamples

LN(1) = 0.0

LN(EXP(2)) = 2.0

Data source supportData source support

ClickHouse 21.8, Microsoft SQL Server 2017 (14.0), MySQL 5.7, Oracle Database 12c (12.1), PostgreSQL 9.3, YDB.