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SIGN (Transact-SQL)

Applies To: SQL Server 2014, SQL Server 2016 Preview

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

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

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database, Azure SQL Data Warehouse Public Preview.

Topic link icon Transact-SQL Syntax Conventions

SIGN ( numeric_expression )

numeric_expression

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

Specified expression

Return type

bigint

bigint

int/smallint/tinyint

int

money/smallmoney

money

numeric/decimal

numeric/decimal

Other types

float

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 is 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)

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