SQRT (Transact-SQL)

Article
02/28/2023
2 minutes to read

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

Returns the square root of the specified float value.

Transact-SQL syntax conventions

Syntax

SQRT ( float_expression )

Note

To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.

Arguments

float_expression
Is an expression of type float or of a type that can be implicitly converted to float.

Return Types

float

Examples

The following example returns the square root of numbers between 1.00 and 10.00.

DECLARE @myvalue FLOAT;  
SET @myvalue = 1.00;  
WHILE @myvalue < 10.00  
   BEGIN  
      SELECT SQRT(@myvalue);  
      SET @myvalue = @myvalue + 1  
   END;  
GO

Here is the result set.

------------------------   
1.0                        
------------------------   
1.4142135623731            
------------------------   
1.73205080756888           
------------------------   
2.0                        
------------------------   
2.23606797749979           
------------------------   
2.44948974278318           
------------------------   
2.64575131106459           
------------------------   
2.82842712474619           
------------------------   
3.0

Examples: Azure Synapse Analytics and Analytics Platform System (PDW)

The following example returns the square root of numbers 1.00 and 10.00.

SELECT SQRT(1.00), SQRT(10.00);