sql server create functions example

SQL Server create functions example

Hello everyone,  I am going to share the code sample for create sql functions

Table of Contents
  1. Add returns type like varchar, int etc.
  2. Declare the return variable.
  3. Add the T-sql statements to compute the return value.
  4. Return the result of the function.

The example for the same as given below.

CREATE FUNCTION [dbo].[fun_GetOrderType]
(
            @Return SMALLINT,
            @Reprocess SMALLINT,
            @Cancel SMALLINT
)
RETURNS VARCHAR(10)
AS
BEGIN
            -- DECLARE THE RETURN VARIABLE HERE.
            DECLARE @type VARCHAR(10)='XYZ'

            -- ADD THE T-SQL STATEMENTS TO COMPUTE THE RETURN VALUE HERE.
            IF (@Return = 1)
                        SET @type = 'RE'
            ELSE IF (@Reprocess = 2)
                        SET @type = 'RPC'
            ELSE IF (@Cancel = 3)
                        SET @type = 'CNL'

            -- RETURN THE RESULT OF THE FUNCTION
            RETURN @type
END



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