Problem with some queries after migration from MS Access

Question

Hi everyone!
We've just finished a migration from a MS Access database and we notice some errors when running some queries like :
Query1:
SELECT A.field1, A.field2, B.field1 as FieldTmp
FROM A,B
where (B.field1 <=10);
Query2:
SELECT Query1.field1, Query1.field2, Query1.FieldTmp
FROM Query1 LEFT JOIN Table3
ON (Table3.field1 = Query1.Field2) AND
(Table3.field5 = Query1.FieldTmp)
WHERE ((Table3.field5) Is Null)
ORDER BY Query1.field1, Query1.FieldTmp;
The Query1 runs as expected, but when I try to run the Query2 I got a ORA-00904 error message. If I remove the (Table3.field5 = Query1.FieldTmp) statement or modify to compare with another field (as instance, field2) everything goes fine.
If I modify the first query to a make-table query, the Query2 request runs as desired too.
Is there anything that we can do to keep the queries statement as it is when using the MS Access DB?
Thanks in advance,
Elaine Viel Denadai

Answer 1

Hi Turloch! Thanks for your help!
Those SQL Statements were extracted from the MS Access application that we will continue to use to access the data , now on an Oracle Database.
I don't know what I can do to make this kind of statements works as it is on Access database. The first query, that I called Query1 works fine on Oracle, I just mentioned it because the 2nd Query , named Query2, use it.
I'm not able to understand why when I change the 1st. query to a "make-table" query the Query2 works as desired, but if I keep the Query1 and Query2 as it is on the MS Access Application I got the ODBC error message and the ORA-00904 error message , related (I think!) to the FieldTmp field used on the LEFT JOIN statement (AND).
As I told before, if I change the AND clause to compare to another field, as instance, field1 :
FROM Query1 LEFT JOIN Table3
ON (Table3.field1=Query1.Field2) AND
(Table3.field5 = Query1.Field1)
it works.
Please, is there anything that I can do to keep the MS Access Application unchanged?
Oracle = 8.1.6
Oracle ODBC Driver = 8.1.6.4
Oracle Migration Workbench = 1.3.1
Thanks in advance,
Elaine Viel Denadai