you have to export out all the 4 tables data out first and import back to
the one table. of course, yr tables fields for the 4 databases must
standardize first before you perform the export and import.
It's actually not necessary to export the tables. Instead, you can use
File... Get External Data... Link to connect to the tables in another
database, and then run an Append query to append the data to the local
table.
This kind of merge can cause many problems, however, especially if the
tables contain Autonumber primary keys which are linked to other
tables in the database; there will almost certainly be cases where a
single autonumber value occurs in two (or all four) tables. It will
probably be necessary to resolve these duplicates before the data can
be successfully combined.
John W. Vinson[MVP]