Question

I have a SQL Query giving me a list of double records in my database.

select periodid, itemid from periodscore  
group by periodid, itemid
having count(*) > 1

This works as expected, but now I would like to retrieve additional fields of these records (such as date last updated etc). So I tried:

select * from periodscore where periodscoreid in
(select periodscoreid from periodscore  
group by periodid, itemid
having count(*) > 1)

Of course this doesn’t work and gives me the error:

Column ‘periodscore.PeriodScoreID’ is
invalid in the select list because it
is not contained in either an
aggregate function or the GROUP BY
clause.

How can I retrieve the extra fields in this query?

Answer 1

select ps.* 
from periodscore ps
inner join (
    select periodid, itemid 
    from periodscore   
    group by periodid, itemid 
    having count(*) > 1
) psm on ps.periodid = psm.periodid and ps.itemid = psm.itemid