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