🚀 go-pugleaf

Hello,please help me because i�m getting crazy........
How can append in database "A" the last record from database "B" ????
I mean it�s the last  invoice number from database "B" to database "A"
which is the main program so i can continue from the last invoice number
and so on......because i want to zap "A" to save some space and speed up the
application.
Thank you very much for your time.
My email is : pizzeriaclaudio@mail.telepac.pt
P.S.
is there  any  function like :
go to "B" and get me the invoice number wihch must be in the last record
and put it in "A" .         ?????????????