In Group class

Question

Hi,
I have below query i want one more colum from fnd_application,if it is null it has to replace with owner but in group by clause it throwing error.
Can any one Please help me , how to resolve it.
select * from(SELECT decode (owner,'APPS','XXX',OWNER) OWNER, NVL ((SELECT application_name
FROM fnd_application_vl
WHERE application_short_name = owner), owner) application,
COUNT (object_name) count
from xxx_objects
     where upper(name)=:1
group by decode (owner,'APPS','XXX',OWNER)
order by count desc)
WHERE ROWNUM <= 20

Answer 1

Hi,
It's easier to get the application name in the main query, rather than in the sub-query.
Here's one way to do that:
WITH     group_by_results     AS
     SELECT       DECODE (owner, 'APPS', 'XXX', owner)     AS owner
     ,       COUNT (object_name)                AS cnt
     FROM       xxx_objects
     WHERE       UPPER (name)     = :1
     GROUP BY  DECODE (owner, 'APPS', 'XXX', owner)
     ORDER BY  cnt      DESC
SELECT       g.owner
,       NVL ( a.application_name
           , g.owner
           )          AS application
,       cnt
FROM           group_by_results    g
LEFT OUTER JOIN      fnd_application_vl  a  ON   a.application_short_name  = g.owner
WHERE       ROWNUM <= 20
;You can get the application_name using a scalar sub-query, as you posted, instead of an outer join, if you prefer.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables involved, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
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