LOG

Returns the logarithm of the numeric input expression. If no base is specified, the natural log (ln) will be calculated.

Syntax

LOG(base_expression FLOAT, expression FLOAT) → DOUBLE

• base_expression: The base to use.

• expression: The value to calculate the log.

Examples

LOG example

SELECT LOG(20.5, 1.5)
-- 0.1342410830900514

LOG(base_expression DOUBLE, expression DOUBLE) → DOUBLE

• base_expression: The base to use.

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(20.5, 1.5)
-- 0.1342410830900514

LOG(expression int64) → DOUBLE

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(10)
-- 2.302585092994046

LOG(base_expression int64, expression int64) → DOUBLE

• base_expression: The base to use.

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(10, 2)
-- 0.30102999566398114

LOG(expression int32) → DOUBLE

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(10)
-- 2.302585092994046

LOG(base_expression int32, expression int32) → DOUBLE

• base_expression: The base to use.

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(10, 2)
-- 0.30102999566398114

LOG(expression float) → DOUBLE

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(12.5)
-- 2.5257286443082556

LOG(expression double) → DOUBLE

• expression: The value for which you want to calculate the log.

Examples

LOG example

SELECT LOG(12.5)
-- 2.5257286443082556

Usage Notes

If base_expression is 1. If base_expression expression is less than 0, NaN will be returned. If the expression input is 0, -Infinity is returned. If the expression input is less than 0, NaN will be returned.