Query taking long time with DISTINCT

Question

I\'m using Microsoft Access 2003. One form in my project takes a long time to appear to users.

This is the applicable query:

SELECT DISTINCT tb_Konze         


        

Answer 1

The use of distinct is essentially doing a group by so you only get "unique" records. If you don't have any duplicate records then this is not needed.

I would place my focus on your joins, instead of the distinct clause.

Answer 2

I will suggest get distinct ids and then in column query get your desired columns.

something like this

Select (select Fehlerpfad from FehlerCodes_akt_Liste where id=A.id ) as col1, ...
from
(
   Select distinct ids from table
   .........
) A