code: public static String getQuestionMark(int count) {
          StringBuilder qMark = new StringBuilder();
          for (int i = 0; i < count; i++) {
              if(i > 0) {
                  qMark.append(", ");
              }
              qMark.append("?");
          }
          return qMark.toString();
      }
docs: Generate the concatenation of ? characters. Used by PreparedStatement.
  @param count Number of ? character to generation
  @return Value ex: "?, ?, ?"