Android = select column1 from table where column2 = column3 order by id desc

Question

how to solve this problem

i'm trying to get the last meter from the table which is similar car number using by id desc

As in the picture

enter image description here

here is my code

 String CarN = carNumber.getText().toString();
                SQLiteDatabase dataBas = logDB.getReadableDatabase();
                int active = 0;
                String activeCar =String.valueOf(active);

                Cursor cursor = dataBas.rawQuery("select "+CarLoadingToSaveUtils.NEW_METER_READING +" from "+
                        CarLoadingToSaveUtils.TABLE_CAR_LOADING_SAVE +" where "+CarLoadingToSaveUtils.CAR_NUMBER_LATTER+" = "+ CarN + " order by "+
                        LogDB.KEY_ID +" desc ",new String[]{activeUser});

                if (cursor.moveToFirst()) {
                    int index6 = cursor.getColumnIndex(CarLoadingToSaveUtils.CAR_NUMBER_LATTER);
                    String Num = cursor.getString(index6);

                        oldMeteReading.setText(Num);
                } else {
                    oldMeteReading.setText("0");
                }

When i run the code i get this error

android.database.sqlite.SQLiteException: near "1234": syntax error (code 1 SQLITE_ERROR 1 ): , while compiling: select newMeteReading from carLoadingSave where carNumber =? 1234 H order by id desc

Answer 1

CarN value (? 1234 H) need to be between quotes

Replace this:
CarLoadingToSaveUtils.TABLE_CAR_LOADING_SAVE +" where "+CarLoadingToSaveUtils.CAR_NUMBER_LATTER+" = "+ CarN + " order by "+

by:
CarLoadingToSaveUtils.TABLE_CAR_LOADING_SAVE +" where "+CarLoadingToSaveUtils.CAR_NUMBER_LATTER+" = '"+ CarN + "' order by "+