My Database Helper Code is Here

public class DataHelper extends SQLiteOpenHelper {
public static final String DB_NAME="myDb";
public static final String Table_Pro="student";

public static final String Create_Pro="Create table if not exists "+Table_Pro+"(id integer primary key autoincrement,pname not null unique,age int,qual text)";

public static final String Delete\_Pro="Drop table if exists "+Table\_Pro;



public DataHelper(Context context) {
    super(context, DB\_NAME, null, 1);

}

@Override
public void onCreate(SQLiteDatabase db) {
  db.execSQL(Create\_Pro);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL(Delete\_Pro);
   // db.execSQL("DROP TABLE IF EXISTS "+Table\_Pro);
    onCreate(db);

}
public void insertProvince(String pname,int age,String qual)
{
    SQLiteDatabase db=this.getWritableDatabase();
    db.beginTransaction();
    ContentValues values;
    try
    {
        values=new ContentValues();
        values.put("pname",pname);
        values.put("age",age);
        values.put("qual",qual);
        db.insert(Table\_Pro, null, values);
        db.setTransactionSuccessful();

    }catch (Exception e)
    {
        e.printStackTrace();
    }
    finally {
        db.endTransaction();
        db.close();
    }


}
public ArrayList<String> getAllProvinces()
{
    ArrayList<String> list=new ArrayList<String>();
    SQLiteDatabase db=this.getReadableDatabase();
    db.beginTransaction();

    try
    {
        String selectQuery = " SELECT \* FROM "+ Table\_Pro;

                Cursor cursor=db.rawQuery(selectQuery,null);
        if(cursor.getCount()>0)
        {
            while (cursor.moveToNext())
            {
                String pname=cursor.getString(cursor.getColumnIndex("pname"));
                list.add(pname);
            }
        }
        db.setTransactionSuccessful();
    }catch (Exception e)
    {
        e.printStackTrace();
    }
    finally {
        db.endTransaction();
        db.close();
    }
    return list;

}

public Cursor getAllDa