calculate total from other database

I have an “order fulfillment” database in which I created “Custom field” “total_import” which
I have to calculate from the “orders” database with the fields “prz” * “qnt”.
How can I do?
thank

By “database” did you actually mean “table”?

yes

You may create a view to join the tables and calculate the total accordingly.

I need to calculate a total field in the ev_ord table by calculating the value of the field “qnt” and “prz” (qnt * prz) which are in the ord table.
it’s possible ?

arbei wrote:

You may create a view to join the tables and calculate the total accordingly.

Create a view to join the ev_ord and the ord table first.

I don’t explain well …
I need to report a total on the “tot” field of the ev_ord table which is
taken from the “orders” table from the “prz * qnt” fields … is it possible ???

You may create a view as suggested or you may use Custom Field, see the topic Custom Field in the help file.