public JSONObject updateNotificationTag(int QUESTION_ID, int USER_ID)
	{	
		try {
			Class.forName(JDBC_DRIVER);
			conn=DriverManager.getConnection(DB_URL,USER,PASS);
			
			stmt=conn.createStatement();
					  
			json=new JSONObject();
			json.put(SUCCESS, 0);		

			int result=stmt.executeUpdate("update NOTIFICATION SET userNotified=1 where USER_ID='"+USER_ID+"' and QUESTION_ID='"+QUESTION_ID+"'");
			
			if(result>0)
				{
					json.put(SUCCESS, 1);
					json.put(MESSAGE, "updated");
				}
			else
			{
				json.put(SUCCESS, 0);
				json.put(MESSAGE, "Error occured");
				
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}finally
		{
			try{
		            if(conn!=null)
		            conn.close();
					stmt.close();
		         }catch(SQLException se){
		            se.printStackTrace();
		         }
		}
		return json;
	}