SQRT (Transact-SQL)

Applies to: yesSQL Server (all supported versions) YesAzure SQL Database YesAzure SQL Managed Instance yesAzure Synapse Analytics yesParallel Data Warehouse

Returns the square root of the specified float value.

Topic link icon 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 (SQL Data Warehouse) and Parallel Data Warehouse

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

SELECT SQRT(1.00), SQRT(10.00);  

Here is the result set.

----------  ------------  
1.00        3.16

See Also

Mathematical Functions (Transact-SQL)