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

This function is used to return the square root of a value.

Syntax

sqrt(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 NULL, NULL is returned.

Example Code

The value 2.8284271247461903 is returned.

select sqrt(8);

The value 4 is returned.

select sqrt(16);

The value NULL is returned.

select sqrt(null);
Parent topic: Mathematical Functions