Access preselection device used on database, has data structure that contains information, concerning presence of suitable data entry in database, for every preselectable value combination

摘要

The access preselection device (1) has a data structure (11) that contains information (12), concerning the presence of a suitable data entry (21) in a database (2), for every preselectable value combination. The information can be the number of suitable data entry or reference to suitable entries of the database.