SQL In invalid format for Oracle

Question

I have some SQL that works fine on SQLServer2000 but is invalid in Oracle 9i, could anyone explain what Oracle doesn't like about this syntax (this is simplified version) and how I can get round it.
Basically it does two different searches and if both suceed then retrieves all information for the matching id's. (In the full version the code is generated by the application and the no of seaches is varaible).
SELECT T5.*
FROM
SELECT T1.ORGANISATION_ID
FROM
SELECT DISTINCT T3.ORGANISATION_ID
FROM ORG_ALIAS T3
WHERE T3.ALIAS LIKE 'testalias'
     UNION ALL
SELECT DISTINCT T4.ORGANISATION_ID
FROM ORGANISATION T4
WHERE T4.ORGANISATION_NAME LIKE 'testname'
) AS T1
GROUP BY T1.ORGANISATION_ID
HAVING COUNT(T1.ORGANISATION_ID)>=2
AS T0
INNER JOIN ORGANISATION T5 ON T0.ORGANISATION_ID = T5.ORGANISATION_ID;
thanks Paul

Answer 1

I don't have 9i yet, so I'm not sure what changes they've made with the joins - I heard that they were going to start supporting something like what you wrote, but I'm not sure of the exact syntax. In any event, the following should work for you:
SELECT T5.*
FROM
(SELECT T1.ORGANISATION_ID
FROM
( SELECT DISTINCT T3.ORGANISATION_ID
FROM ORG_ALIAS T3
WHERE T3.ALIAS LIKE 'testalias'
UNION ALL
SELECT DISTINCT T4.ORGANISATION_ID
FROM ORGANISATION T4
WHERE T4.ORGANISATION_NAME LIKE 'testname'
) T1
GROUP BY T1.ORGANISATION_ID
HAVING COUNT(T1.ORGANISATION_ID)>=2
) T0
where T0.ORGANISATION_ID (+)=T5.ORGANISATION_ID
Remove the AS from in front of the T0 and the T1 statements and change your inner join to what I put down.
Eric