El 30/01/12 18:10, Alan Bourke escribió:
>
> On Mon, Jan 30, 2012, at 04:29 PM, Paul Newton wrote:
>> Perhaps he will let us know which approach
>> he prefers :)
>>
>>
> I just want a .t. or .f. if the rows that pertain to a particular
> account/reference/date combination have a mixture of negative and
> positive values. All negative or all positive is fine!
Untested :
select Account, Reference, Date
, (!IsNull(Pos.Account) and !IsNull(Neg.Account)) as 'IsMixture'
from TheTable TT
left join ( select Distinct Account, Reference, Date
from TheTable
where Value > 0
) Pos
on Pos.Account = TT.Account
and Pos.Reference = TT.Reference
and Pos.Date = TT.Date
left join ( select Distinct Account, Reference, Date
from TheTable
where Value < 0
) Neg
on Neg.Account = TT.Account
and Neg.Reference = TT.Reference
and Neg.Date = TT.Date
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