LOG

Syntax

LOG( value, base )

Description

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

Argument types:

• value — Fractional number | Integer
• base — Fractional number | Integer

Return type: Fractional number

Examples

LOG(1, 2.6) = 0.0

LOG(1024, 2) = 10.0

LOG(100, 10) = 2.0

Data source support

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