public ResultSet select(String column[]){
    	try
        {
        	
            stmt = conn.createStatement();
            String query = "select ";
            for(int i=0;i<column.length;i++){
            	query += column[i] + ", ";
            }
            query = query.substring(0, query.length()-3);
            
            query += " from "+ table_name;
            results = stmt.executeQuery(query);
            stmt.close();
        }catch (SQLException sqlExcept)
        {
            sqlExcept.printStackTrace();
        }
    	return results;
    }