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:

    • valueFractional number | Integer
    • baseFractional 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.