Help Center> Data Lake Insight> Spark SQL Syntax Reference> Built-In Functions> Mathematical Functions> log10
Updated on 2023-10-25 GMT+08:00
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log10

This function is used to return the natural logarithm of a given value with a base of 10.

Syntax

log10(DOUBLE a)

Parameters

Table 1 Parameter

Parameter

Mandatory

Type

Description

a

Yes

DOUBLE, BIGINT, DECIMAL, or STRING

The value can be a float, integer, or string.

If the value is not of the DOUBLE type, the system will implicitly convert it to the DOUBLE type for calculation.

Return Values

The return value is of the DOUBLE type.

If the value of a is negative, 0, or NULL, NULL is returned.

Example Code

The value NULL is returned.

select log10(null);

The value NULL is returned.

select log10(0);

The value 0.9542425094393249 is returned.

select log10(9);

The value 1 is returned.

select log10(10);
Parent topic: Mathematical Functions