Simple math issue

[Matt_T_hat]

I have a database that supplies numbers for some math.

The math is of the form A plus B over C

A + B
------
C

However sometimes C is 0.

Therefore I need a formula that will work normally for all values greater than nothing but result in 0 when C is 0. Is this do able?

Thanks guys.

[manavo11]

Have a system :

A+B
C , for C>0
0 , for C=0

[Matt_T_hat]

Originally posted by manavo11
Have a system :

A+B
C , for C>0
0 , for C=0

I was hopeing that there was some formula with a bit of +1, -1 etc that would simply by pass div by zero... I hate editing the raw SQL as it is nested six selects deep.

[Ecniv]

You'll need an equivalent of iif (instant if).

iif(c=0,0,(a+b/c))

either that or put the formula into a sub query with a linkable ID filtered on the c<>0.


Vince

[Matt_T_hat]

Originally posted by Ecniv
You'll need an equivalent of iif (instant if).

iif(c=0,0,(a+b/c))

either that or put the formula into a sub query with a linkable ID filtered on the c<>0.

Vince

Probably yes. I don't want to face what access does to nested queries when you open them back up... but yes at least you have illiminated non-options.

[Something Else]

Hmmm,
Well:

(1\(C+1)) + C

Results in 1 if C = 0, or C when C > 0.

But you now need a multiplier that = 0 when C = 0, or 1 when C <> 0.

Hmmm,

K = (1\(C+1))+C

So,

When C = 0, then K = 1
When C > 0, then K = C

So:

C/K = 0 when C = 0,
C/K = 1, when C > 0.

Therefore:

(C/K)*(A+B)/(K)
where
K = (1\(C+1))+C
hmmm,
Is that Right?


-Lou

[Matt_T_hat]

Looks hopefull

[Matt_T_hat]

I loved the math however smarty pants in the office next door may have jsut shown us all up "why not simply ignore all values of 0 and never use it as +0 and 0 not added is the same"

beasty!