Multi level selecting and function in a Oracle IQ database - oracle

Question

There i a simplified table myowner.mydable with at least columns order_nr,the_days, and i us a multilevel select-query
select * from (
select
The sum(..) function does not work in a inner select-query. How to do use a function in a inner select???
(select sum(the_days) from myowner.mydable where order_nr=confnr) "thedays",--this is a line 4
confnr as order_nr
from (
select order_nr as confnr,the_days from myowner.mydable WHERE order_nr='5276751'
) as t
union all
And there i get an another order_nr
select
(select sum(the_days) from myowner.mydable where order_nr=confnr) "thedays",
confnr as order_nr
from (
select order_nr as confnr,the_days from myowner.mydable WHERE order_nr='5276751'
) as t
) as t2
Select (.....) as t works. But select ((.....) as t union all (.....) as t) as t2 gives an error:
Could not execute statement.
Feature, scalar value subquery (at line 4) outside of a top level SELECT
list, is not supported.
-- (opt_Select.cxx 2238)
SQLCODE=-1001030, ODBC 3 State="HY000"
Line 1, column 1
How to get rid from the error?

Answer 1

If you need execute this query often, you can try to create view based on this query and use it.
Also, your subquery looks strange. This:
select
(select sum(the_days) from myowner.mydable where order_nr=confnr) "thedays",
confnr as order_nr
from (
select order_nr as confnr,the_days from myowner.mydable WHERE order_nr='5276751'
) as t
is equal to this:
select sum(the_days), order_nr from myowner.mydable where order_nr = '5276751'
group by order_nr
UPD Full query you can transform like this:
select t.category, t.def_or_indef, t.book_date, t.book_code, t.revenue,
t2.conf_nr,
t2.mydays,
t.revenue / t2.mydays
from (select category, def_or_indef, book_date, book_code,
revenue,
confnr as conf_nr
from (select CASE WHEN status = 'status1' OR status = 'status2' THEN 'category1' ELSE 'category2' END AS category,
CASE WHEN status = 'status1' OR status = 'status2' THEN 'definite' ELSE 'indefinite' END AS def_or_indef,
book_date,
book_code,
revenue,
conf_nr as confnr
from myowner.mydable
WHERE days > 0
AND book_date IS NOT NULL
AND DATE(dateadd(year,-1,dateadd(day,-day(today()),today()))) < book_date
AND book_date <= date(dateadd(day,-day(today()),today()))) as t
union all
select .. from ( select .. WHERE .. AND DATE(dateadd(day,-day(today()),today())) < resv_date and resv_date < today()
) as t,
(select conf_nr, sum(days) as mydays
from myowner.mydable
group by conf_nr) t2

Answer 2

I give a real query:
select * from (
select
category, def_or_indef, book_date, book_code,
(select sum(days) from myowner.mydable where conf_nr=confnr) as mydays,
revenue, confnr as conf_nr,
revenue / (select sum(days) from myowner.mydable where conf_nr=confnr) as adr
from (
select
CASE WHEN status = 'status1' OR status = 'status2' THEN 'category1' ELSE 'category2' END AS category,
CASE WHEN status = 'status1' OR status = 'status2' THEN 'definite' ELSE 'indefinite' END AS def_or_indef,
book_date, book_code, revenue, conf_nr as confnr
from myowner.mydable
WHERE days > 0 AND book_date IS NOT NULL AND
DATE(dateadd(year,-1,dateadd(day,-day(today()),today()))) < book_date AND book_date <= date(dateadd(day,-day(today()),today()))
) as t
union all
select .. from ( select .. WHERE .. AND
DATE(dateadd(day,-day(today()),today())) < resv_date and resv_date < today()
) as t
) as t2
Can you give working equal to this?