public String[] identifyStaff(String name){
		String[] result = new String[6];
		String basic_query = "select * from staff where name ='"+name+"'";
		Object[][] data = helper.executeSelectQuery(basic_query);
		if(data.length>0){
			for(int i=0; i<data[0].length;i++){
				result[i] = data[0][i].toString();
			}
		}
		String customer_count_query = "select customer_name,count(customer_name) as customer_count from reservation where staff_name='"+name+"' group by customer_name order by customer_count desc";
		Object[][] data2 = helper.executeSelectQuery(customer_count_query);
		if(data2.length>0){
			if(data2[0][0] != null)
				result[4] = data2[0][0].toString()+" ("+data2[0][1]+"ȸ)";
		}
		String room_count_query = "select room_number,count(room_number) as room_count from reservation where staff_name='"+name+"' group by room_number order by room_count desc";
		Object[][] data3 = helper.executeSelectQuery(room_count_query);
		if(data3.length>0){
			if(data3[0][0]!= null)
				result[5] = data3[0][0].toString()+" ("+data3[0][1]+"ȸ)";
		}
		
//		for(int i=0; i<result.length;i++){
//			if(result[i] != null)
//				System.out.print(result[i]+" ");
//		}
		return result;
	}