Question

I have a SQL statement that displays the following values, but the number of rows can be anything.

   SELECT NameID,Name,ValueID,Value FROM Options WHERE OptionID = 10000

Which results to:

 NameID  |  Name   |  ValueID  |  Value

 100     |  Color  |  10000    |  Black
 101     |  Size   |  10005    |  Large

Or sometimes even:

 NameID  |  Name   |  ValueID  |  Value

 100     |  Color  |  10000    |  Black
 101     |  Size   |  10005    |  Large
 102     |  Height |  10009    |  Tall
 103     |  Width  |  10006    |  Wide

I’m trying to write a Stored Procedure that can allow me to check if ALL of these value’s exist based on OptionID

Therefore,

1. The statement would allow an input of OptionID of course to only show all the options inside the Options table for this OptionID
2. The statement would allow an input of multiple paired values for NameID and ValueID

The general logic needed would be something like this:

if ALL NameID and ValueID Pairs with-in an OptionID Exists
(as shown above in the results) 
   Then Return 'Unique Combination'
     Else Return 'Combination Exists'

Boolean would be fine as well. I’ve tried using a PIVOT to see if it can be done like this, but that was a bit more than i think i needed, but maybe not.. Any suggestions?

Answer 1

You can use an if exists statement.

if exists(SELECT NameID,Name,ValueID,Value FROM Options WHERE OptionID = @optionID and NameId = @NameID and ValueID = @ValueID)
begin
   --do whatever you want
end
else
begin
   --do whatever else you want
 end

Updated answer

Declare @Loop as int,@POS int, @PAirs varchar(max),@CurrentPair varchar(max)
Declare @NameID as int,@ValueID as int, @Loop2 as int,@Pos2 int

SELECT @Pos = CHARINDEX(';', @Pairs, 1)
print @Pos
SELECT @Loop = CASE WHEN LEN(@Pairs) > 0 THEN 1 ELSE 0 END
    WHILE (SELECT @Loop) = 1
    BEGIN
        SELECT @Pos = CHARINDEX(';', @Pairs, 1)
        IF @Pos > 0
            BEGIN
                set @CurrentPair = SUBSTRING(@Pairs, 1, @Pos - 1) --Here it is a comma delimited string such as 100,20000
                set @Pairs = SUBSTRING(@Pairs, @Pos + 1, LEN(@Pairs) - @Pos) --This takes the current pair away from original string

                SELECT @Loop2 = CASE WHEN LEN(@CurrentPair) > 0 THEN 1 ELSE 0 END
                While (Select @Loop2) = 1
                    Begin
                        SELECT @Pos2 = CHARINDEX('2', @CurrentPair, 1)
                        If @Pos2 > 0
                            Begin
                                set @NameID = SUBSTRING(@CurrentPair, 1, @Pos2 - 1)
                                set @ValueID = SUBSTRING(@CurrentPair, @Pos2 + 1, LEN(@CurrentPair) - @Pos2)

                                if exists(SELECT NameID,Name,ValueID,Value FROM Options 
                                            WHERE NameId = @NameID and ValueID = @ValueID)
                                    begin
                                        --pair found
                                    end
                                else
                                    begin
                                        --pair not found
                                    end

                            End
                        Else
                            Begin
                                set @Loop2 = 0
                            End
                    End
            END
        ELSE
            BEGIN
                set @Loop = 0
            END
    END