I built some subquery:
select
q2.addedquests, q2.daynum
from
qrNumberOfQuestsToDo as q2
inner join
qrNumberOfQuestsToDo as q3 on q2.daynum > q3.daynum
where
q2.DayNum = (select max(q3.DayNum) from q3);
but MS Access does not recognize q3
in the subquery. Why?
Why not? Because that is how SQL works. You can refer to a column of q3
in the subquery (in the select
, where
, group by
, having
, order by
, or on
clause for instance), but not to the entire table.
I am continuing, but I think the query is non-sensical. In one place, the query says that q2.daynum > q3.daynum
. In another, that q2.daynum = q3.daynum
. Hence, the query will not return anything. But, you can still express it as valid SQL. Notice that q3
is not really needed in the outer query. Try a correlated subquery instead:
select q2.addedquests, q2.daynum
from qrNumberOfQuestsToDo as q2
where q2.DayNum = (select max(q3.DayNum)
from qrNumberOfQuestsToDo q3
where q2.daynum>q3.daynum
) ;
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