A android railway quert app chang

I have a railway query sys, Have data scrach from the web, and the railway schedual data is stored in file. Now I want to transfer the data to SQLite. And also the query result need added more field. Before it have ,train number, start station, arrived station, time consuming, etc. Now I want the query reult contain all passing stations, and the price of the train ticket resonding different station to. So minor changes, and less bufget 30-50$