I typed the following query into the DSQL tab of IB_SQL:

select customerid from enrolls A where A.sectionid in (select B.sectionid
from sections B where sectionstartdate >= '1/1/03' and sectionstartdate <=
'1/1/04') and enrollwaiting <> 'T'

I get an error back, saying "multiple rows in singleton select". I don't
understand. I don't see a singleton select anywhere in that query.

Anyone understand why I'm getting this error?

-Joe