Ask Example Edit Database Table From DatagridView

Hello all

Please point me example available on the net about editing Database tables from datagridview,if one lines of datagridview is a combination of two or more tables.
for example
in datagridview column BuyerName come from TblBuyer,Column SalesName come from
TblSales.
To show both Tables in datagridview lines I joined the two tables.

how to edit both table  from datagridview ??

thank

denny