---
title: "SQRT (Transact-SQL) | Microsoft Docs"
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ms.date: "03/03/2017"
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f1_keywords: 
  - "SQRT"
  - "SQRT_TSQL"
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  - "TSQL"
helpviewer_keywords: 
  - "SQRT function"
  - "square root values"
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---
# SQRT (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-all-md](../../includes/tsql-appliesto-ss2008-all-md.md)]

  Returns the square root of the specified float value.  
  
 ![Topic link icon](../../database-engine/configure-windows/media/topic-link.gif "Topic link icon") [Transact-SQL Syntax Conventions](../../t-sql/language-elements/transact-sql-syntax-conventions-transact-sql.md)  
  
## Syntax  
  
```  
SQRT ( float_expression )  
```  
  
## Arguments  
 *float_expression*  
 Is an [expression](../../t-sql/language-elements/expressions-transact-sql.md) 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  
```  
  
 [!INCLUDE[ssResult](../../includes/ssresult-md.md)]  
  
```  
------------------------   
1.0                        
------------------------   
1.4142135623731            
------------------------   
1.73205080756888           
------------------------   
2.0                        
------------------------   
2.23606797749979           
------------------------   
2.44948974278318           
------------------------   
2.64575131106459           
------------------------   
2.82842712474619           
------------------------   
3.0  
```  
  
## Examples: [!INCLUDE[ssSDWfull](../../includes/sssdwfull-md.md)] and [!INCLUDE[ssPDW](../../includes/sspdw-md.md)]  
 The following example returns the square root of numbers `1.00` and `10.00`.  
  
```  
SELECT SQRT(1.00), SQRT(10.00);  
```  
  
 [!INCLUDE[ssResult](../../includes/ssresult-md.md)]  
  
 ```
----------  ------------  
1.00        3.16
```  
  
## See Also  
 [Mathematical Functions &#40;Transact-SQL&#41;](../../t-sql/functions/mathematical-functions-transact-sql.md)