sqrt-transact-sql.md

---

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.component: "t-sql|functions" ms.reviewer: "" ms.suite: "sql" ms.technology: t-sql ms.tgt_pltfrm: "" ms.topic: "language-reference" f1_keywords:

• "SQRT"
• "SQRT_TSQL" dev_langs:
• "TSQL" helpviewer_keywords:
• "SQRT function"
• "square root values" ms.assetid: 26e244e8-e82d-4664-a445-1226230ee1c5 caps.latest.revision: 37 author: edmacauley ms.author: edmaca manager: craigg monikerRange: ">= aps-pdw-2016 || = azuresqldb-current || = azure-sqldw-latest || >= sql-server-2016 || = sqlallproducts-allversions"

---

SQRT (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all-md]

Returns the square root of the specified float value.

Transact-SQL Syntax Conventions

Syntax

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)