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SQL SIGN Function

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The SQL SIGN function is one of the SQL Mathematical function, which is used to return sign of the specified expression, and the sign maybe Positive (+1), Negative (-1) or Zero (0). In this article we will show you, How to use/write SQL Server SIGN function with example.

SQL SIGN Function Syntax

The basic syntax of the SQL Server SIGN Function is as shown below:

SELECT SIGN (Numeric_Expression)
FROM [Source]

Numeric_Expression: This function accepts exact numeric, or an approximately numeric data types. Remember that, it will not accept the Bit data type.

  • If the Numeric_Expression argument is positive or negative Zero, SIGN function will return Zero as result.
  • If the Numeric_Expression argument is Negative Number, SIGN function will return Negative One(-1) as result.
  • If the Numeric_Expression argument is positive Number, SIGN function will return Positive One(+1) as result.

SQL SIGN Function Example 1

In this example, We are going to find the sign values of different data (positive and negative values) and display the output

T-SQL CODE

DECLARE @i INT
SET @i = 10

SELECT SIGN(@i)AS [Sign Result 1]

-- Finding Degrees directly
SELECT SIGN(150) AS [Sign Result 2]
SELECT SIGN(14.25) AS [Sign Result 3]

SELECT SIGN(0) AS [Sign Result 4]
SELECT SIGN(-0) AS [Sign Result 5]

SELECT SIGN(-25) AS [Sign Result 6]
SELECT SIGN(-104.449) AS [Sign Result 7]

OUTPUT

SQL SIGN Function 1

ANALYSIS

Below lines of code is used to declare float variable and assigning the random value.

DECLARE @i INT
SET @i = 10

Next, we are finding the Sign of @i. We used the SQL ALIAS Column to assign new name to the result as ‘Sign Result 1’.

SELECT SIGN(@i)AS [Sign Result 1]

In the below statement, We used SIGN function directly on the positive values.

SELECT SIGN(150) AS [Sign Result 2]
SELECT SIGN(14.25) AS [Sign Result 3]

Next, We used SIGN function on positive and negative zero

SELECT SIGN(0) AS [Sign Result 4]
SELECT SIGN(-0) AS [Sign Result 5]

Next, We used SIGN function directly on the negative values

SELECT SIGN(-25) AS [Sign Result 6]
SELECT SIGN(-104.449) AS [Sign Result 7]

SQL SIGN Function Example 2

In this example, We are going to find the sign of all the records present in the [Service Grade] column using DEGREES Function.

T-SQL CODE

SELECT [EnglishProductName]
      ,[Color]
      ,[StandardCost]
      ,[SalesAmount]
      ,[TaxAmt]
      ,[Service Grade]
      ,SIGN([Service Grade]) AS [Service_Sign]
  FROM [SQL Tutorial].[dbo].[Mathemetical Functions]

OUTPUT

SQL SIGN Function 2

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