sqrt-transact-sql.md

description	SQRT (Transact-SQL)
title	SQRT (Transact-SQL) | Microsoft Docs
ms.custom
ms.date	03/03/2017
ms.prod	sql
ms.prod_service	database-engine, sql-database, sql-data-warehouse, pdw
ms.reviewer
ms.technology	t-sql
ms.topic	reference
f1_keywords	SQRT SQRT_TSQL
dev_langs	TSQL
helpviewer_keywords	SQRT function square root values
ms.assetid	26e244e8-e82d-4664-a445-1226230ee1c5
author	julieMSFT
ms.author	jrasnick
monikerRange	>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

SQRT (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw]

Returns the square root of the specified float value.

Transact-SQL Syntax Conventions

Syntax

SQRT ( float_expression )  

[!INCLUDEsql-server-tsql-previous-offline-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  

[!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)