убрал запросы лишних таблиц

src/main/java/ru/egspt/Data.java

@@ -24,7 +24,7 @@ public class Data extends UserListModel  {
      */
     public ArrayList<Quiz> getQuizesFromBase(Base base) {
         ArrayList<Quiz> q = new ArrayList<>();
-        String querry = "SELECT id, name, timelimit FROM mdl_quiz";
+        String querry = "SELECT id, name FROM mdl_quiz";
         ResultSet rs = base.querry(querry);
         try {
             while (rs.next()){
@@ -86,38 +86,9 @@ public class Data extends UserListModel  {
     /**
      *   @return полный перечень результатов из базы
      */
-    /**
-     * 
-     * @param base
-     * @return
-     
-     public ArrayList<Result> getResultsFromBase(Base base) {
-        ArrayList<Result> r = new ArrayList<>();
-        String querry = "SELECT id, quiz, userid, grade, timemodified FROM mdl_quiz_grades";
-        ResultSet rs = base.querry(querry);
-        try {
-            while (rs.next()){
-                int id = rs.getInt("id");
-                int quizid = rs.getInt("quiz");
-                int userid = rs.getInt("userid");
-                double grade = rs.getDouble("grade");
-                Long time = rs.getLong("timemodified");
-                Result result = new Result(id, quizid, userid, grade, time);
-                r.add(result);
-            }
-        }
-        catch (Exception ex){
-            System.err.println ("Подключение к серверу баз данных не установлено ... ");
-            ex.printStackTrace();
-            System.out.println (ex);
-        }
-        return r;
-    }
-    */
-
     public ArrayList<Result> getResultsFromBase(Base base) {
         ArrayList<Result> r = new ArrayList<>();
-        String querry = "SELECT id, quiz, userid, attempt, timestart, timefinish, timemodified, sumgrades FROM mdl_quiz_attempts";
+        String querry = "SELECT id, quiz, userid, attempt, timestart, timefinish, sumgrades FROM mdl_quiz_attempts";
         ResultSet rs = base.querry(querry);
         try {
             while (rs.next()){