title: Database Design : Is it a good idea to combine two tables with the same columns and too many data?
body: <p>I have two table with the same columns,one is use to save bank's amount and the other to save cashdesk,they both might have many data,so i'm concerned about data retrieving speed.I don't know it's better to combine them by adding extra column to determine type of each record or create a separate table for each one?</p>