SIGN (Transact-SQL)

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric

Returns the positive (+1), zero (0), or negative (-1) sign of the specified expression.

Transact-SQL syntax conventions

Syntax

SIGN ( numeric_expression )  

Arguments

numeric_expression
Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type.

Return Types

Specified expression	Return type
bigint	bigint
int/smallint/tinyint	int
money/smallmoney	money
numeric/decimal	numeric/decimal
Other types	float

Examples

The following example returns the SIGN values of numbers from -1 to 1.

DECLARE @value REAL  
SET @value = -1  
WHILE @value < 2  
   BEGIN  
      SELECT SIGN(@value)  
      SET NOCOUNT ON  
      SELECT @value = @value + 1  
      SET NOCOUNT OFF  
   END  
SET NOCOUNT OFF  
GO  

Here's the result set.

(1 row(s) affected)  
  
------------------------   
-1.0                       
  
(1 row(s) affected)  
  
------------------------   
0.0                        
  
(1 row(s) affected)  
  
------------------------   
1.0                        
  
(1 row(s) affected)  

Examples: Azure Synapse Analytics and Analytics Platform System (PDW)

The following example returns the SIGN values of three numbers.

SELECT SIGN(-125), SIGN(0), SIGN(564);  

Here's the result set.

-----  -----  -----  
-1     0      1

See Also

Mathematical Functions (Transact-SQL)