It would be great to have filters in database bar columns (like auto-filters in Google spreadsheets, Excel, Calc etc). It should allow entering search criteria, sorting, manual item filter selection etc. That would significantly improve user experience.
Any filtering on the database is achieved through adding a series of search criteria in the Database Bar, using the Add, Del, Clear and 'and' , 'or' options.
Double clicking on a column header sorts ascending/descending.
In setup of the tables the 'Interpret As' setting will define the sort criteria.