Field help (TBL) 

Index

Iftwo consecutive lines have the same table then the selected records are thosethat will meet the combination of the two criteria.

Toselect the records that will satisfy  tothe one or to the other of the criteria  one should a line whose field has the value of « Or ».

Iftwo consecutive lines have different tables then the criteria are evaluatedindependently one from the other.