i facing a problem ie the data didn't update at oracle database when two users are using same form at same time saving. i am using vb.net and oracle 10g as server. oracle 9i is client.pls clear my doughts.
Perhaps they both updated, but they didn't lock, so the second update overwrote the first one. You could check this by tracing the sessions or (probably easier) temporarily putting a trigger on the table.