Question

from the following data basis i need to select all IDQ‘s which do not have an entry for the 11.11.2011.

IDQ | DATE
----------------
 1  | 08.11.2011
 1  | 09.11.2011
 1  | 10.11.2011
 1  | 12.11.2011
 1  | 13.11.2011

i can’t figure out how to express the sql

select
   IDQ
from
   TBL_WITH_IDQ T
where not exists ( DATE = '11.11.2011' ) // sql does not the job

Database is a Oracle 11g.

maybe someone can help me?

Answer 1

Try:

select idq
from TBL_WITH_IDQ
group by idq
having max(decode("DATE", '11-Nov-2011',1, 0)) = 0 -- double-quoted keyword column name

(Single pass solution) – if your original table is TBL_WITH_IDQ

On the other hand, if your original table is TBL_WITH_DATES and you want to include IDQs with no entries at all, I’d suggest this variant of Parkyprg’s solution:

select IDQ
from TBL_WITH_IDQ t
where not exists
(SELECT null 
 FROM TBL_WITH_DATES d
 where d."DATE" = '11-Nov-2011' and t.idq = d.idq)