Re: Select Statement

<kooroorinya_at_gmail.com> schreef in bericht news:a6347c54-3e27-4931-a26e-278d518ec03a_at_w5g2000prd.googlegroups.com... On May 21, 7:38 am, "ame..._at_iwc.net" <ame..._at_iwc.net> wrote:
> Hi,
>
> We have a procedure where we store the SELECT statements in a table,
> and the procedure grabs them from the table and appends the WHERE
> clause.....etc.....
>
> In a few of the SELECTS we have formulas: A + B, A + B - C, A + B -
> C / D.......
>
> Sometimes the values that come in are legit, this is no problem.
> Other times they come in a -99999.
>
> What they want is that for a given formula (A + B), if ANY of the
> values are -99999, then replace that value with a zero and perform the
> formula. Easy, you can use DECODE.
>
> However, if ALL the values in the formula are -99999, then leave the
> result of the formula as -99999.
>
> How can this be done? I can use a VERY cryptic DECODE statement.
> But because the number of arguments in the formula can vary.....I do
> not know if I can create a function to be called to process the values
> passed, such as the value and the operator......this would be passing
> arrays from a SQL statement......
>
> Can this be done????
>
> Thank you!

-If -99999 is the lowest possible value, you may be able to use the
-following construct
-
-select case
-        when greatest(a,b,c)=-99999 then -99999
-       when least(a,b,c)=-99999 then 0
-         else a+b-c
-       end calc
- from table

This does not meet the specs:
-99999 + 3 -1 should calculate to 2, not 0 ..

Shakespeare Received on Thu May 22 2008 - 02:53:49 CDT