sqrt-transact-sql.md

title	SQRT (Transact-SQL) | Microsoft Docs
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ms.date	03/03/2017
ms.prod	sql-non-specified
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ms.technology	database-engine
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ms.topic	language-reference
f1_keywords	SQRT SQRT_TSQL
dev_langs	TSQL
helpviewer_keywords	SQRT function square root values
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author	BYHAM
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SQRT (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all_md]

Returns the square root of the specified float value.

Transact-SQL Syntax Conventions

Syntax

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
SQRT ( float_expression )  

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  

[!INCLUDEssResult]

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

Examples: [!INCLUDEssSDWfull] and [!INCLUDEssPDW]

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

SELECT SQRT(1.00), SQRT(10.00);  

[!INCLUDEssResult]

---------- ------------

1.00 3.16

See Also

Mathematical Functions (Transact-SQL)