Query problem in viewobject wizard

Question

I have problem to viewobject creation
In the sql Query of viewobject wizard, I can not use build-in sql function like trunc, nvl to the attribute
if I use function, there is no problem with query test(query is valid). However when I click ok or apply button
it popup message like this:
"the following attributes will be set as transients. Derived expression will be lost"
Does this mean I can not use any build-in fuction in select list in view obect wizard?
Another question is how can I nest sql in the select list?
for instance:
in my select list in Query(viewobject wizard)
I have Query:
select Customer.CUSTOMER_ID,
Customer.BANK_NUMBER,
Customer.TRANS_AMOUNT,
from CUSTOMER Customer
where Customer.CUSTOMER_ID =:0
it works without problem
But if add nested select query:
select Customer.CUSTOMER_ID,
Customer.BANK_NUMBER,
(select sum(c.TRANS_AMOUNT)
from CUSTOMER c
where......
) as "Amount"
Account.FILE_NAME,
from CUSTOMER Customer, ACCOUNT Account
where Customer.CUSTOMER_ID =:0
It did not work.
Can somebody tell me how to solve this problem?
Or is there another way to achieve this?
thanks

Answer 1

sory i wrote the wrong one
function CF_ITEMFormula return number is
v_item number(30);
begin
IF :P_state  ALL then
        IF :P_STATE = 'SMALL' THEN
        SELECT aa.item
        INTO v_item
        FROM tableA aa,
                 tableb bb
        WHERE aa.code = bb.code
        AND aa.date = :P_date
        AND aa.name = :P_name
        AND bb.state LIKE '%et%''
        AND (case :P_DIV
                when ('west') then aa.division = 1
                when ('east') then aa.division = 2
                when ('south') then aa.division = 3
                when ('south & west) then aa.division in (1,3)
                else aa.division in (1,2,3)
                end);
        end if;
       IF :P_STATE = 'BIG' THEN
        SELECT aa.item
        INTO v_item
        FROM tableA aa,
                 tableb bb
        WHERE aa.code = bb.code
        AND aa.date = :P_date
        AND aa.name = :P_name
        AND bb.state LIKE '%wa%''
        AND (case :P_DIV
                when ('west') then aa.division = 1
                when ('east') then aa.division = 2
                when ('south') then aa.division = 3
                when ('south & west) then aa.division in (1,3)
                else aa.division in (1,2,3)
                end);
        end if;
end if;
EXCEPTION
WHEN NO_DATA_FOUND THEN RETURN (0)
end;