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SQRT (Transact-SQL)

 

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

Returns the square root of the specified float value.

Topic link icon Transact-SQL Syntax Conventions

  
SQRT ( float_expression )  

-- Azure SQL Data Warehouse and Parallel Data Warehouse  
SQRT (float_expression )  

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

float

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  

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

Mathematical Functions (Transact-SQL)

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