SQL Server SQRT() Function

Return the square root of a number:

SELECT SQRT(64);

Definition and Usage

The SQRT() function returns the square root of a number.

SQRT( number)

Parameter	Description
number	Required. A positive number to calculate the square root of

Works in:	SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse

Return the square root of a number:

SELECT SQRT(13);