Re: Query Help

Wouldn't that return every A.id ? since A.id would be compared to -1, and the wouldnt' be the same.

I want:

select min(A.id) such that A.charge, B.userid, C.employee_id in
(
select A.charge
, B.user_id
, C.employee_id
from A
inner join B using (user_id)
inner join C using (employee_id)

except

select X.charge
, Y.user_id
, Z.employee_id
from X
inner join Y using (user_id)
inner join Z using (employee_id)
)

"scott.marlowe" <scott(dot)marlowe(at)ihs(dot)com> wrote:

>On Thu, 23 Oct 2003 yusuf0478(at)netscape(dot)net wrote:
>
>> I'm interested in finding the minimim A.id such that the following holds:
>>
>> select A.charge
>> , B.user_id
>> , C.employee_id
>> from A
>> inner join B using (user_id)
>> inner join C using (employee_id)
>>
>> except
>>
>> select X.charge
>> , Y.user_id
>> , Z.employee_id
>> from X
>> inner join Y using (user_id)
>> inner join Z using (employee_id)
>>
>> --
>>
>> I can't do the following, since the number of selected columns have to match:
>>
>> select A.id
>> , A.charge
>> , B.user_id
>> , C.employee_id
>> from A
>> inner join B using (user_id)
>> inner join C using (employee_id)
>>
>> except
>>
>> select X.charge
>> , Y.user_id
>> , Z.employee_id
>> from X
>> inner join Y using (user_id)
>> inner join Z using (employee_id)
>
>Maybe you can add a dummy field in the second half like this:
>
>except
>
> select -1
> , X.charge
> , Y.user_id
> , Z.employee_id
>
>???
>
>
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>
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