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Writing Functions in SQL

Posted on 2009-05-07
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Last Modified: 2012-06-21

5) Write a function named min that takes three int values as arguments, and returns the smallest.

How do I get the smallest number using the following Function
CREATE FUNCTION dbo.min (
 

@num1 int,
 

@num2 int,
 

@num3 int )
 

Returns int
 

as 
 

begin 
 

return

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Question by:iolike
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Accepted Solution

by:
Aneesh Retnakaran earned 500 total points
ID: 24333439
CREATE FUNCTION dbo.minimum (
@num1 int,
@num2 int,
@num3 int )
Returns int
as
begin
      declare @min int
      SELECT @Min = CASE WHEN @num1 < @num2 THEN @num1 ELSE @num2 END
      SELECT @Min = CASE WHEN @Min< @num3 THEN @Min ELSE @num3 END
      RETURN (@min)
END

go
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LVL 40

Expert Comment

by:Sharath
ID: 24333550
this will also do.
call this function like this. as you want the function name as MIN, you need to use [ and ] as MIN is key word.

select dbo.[min](1,5,3)

CREATE FUNCTION dbo.[min] (

@num1 int,

@num2 int,

@num3 int )

Returns int

as 

begin

      declare @table table(num int)

      declare @min int

      insert @table values (@num1)

      insert @table values (@num2)

      insert @table values (@num3)

      select @min = min(num) from @table

      return (@min)

end

go 

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