Hello again,
for all users with the same "problem": I have created an update-trigger: AS begin if(new.status = 5) then begin if (not exists (select 1 from t_pictures where status < 5 and kd_id = new.kd_id and li_id = new.li_id)) then update t_pictures set status = 6 where kd_id = new.kd_id and li_id = new.li_id; end end Now I only read the first record with status 6, after the feedback of the pc-program I delete all pictures with status 6 No performance-problem at the time! Thanks for your help. PS: If there is anything to do for even better performance, thanks for your advices. Best regards Olaf [Non-text portions of this message have been removed]