Delete first N rows in android sqlite database

Question

Please let me know how to delete n-rows in android sqlite database. I used this code:

   String ALTER_TBL =\"delete from \" + MYDATABASE_TABLE +
         \"w         


        

Answer 1

It is a bit long procedure but you can do it like this

first get the ids column of table from which which you want to delete certain values

public Cursor KEY_IDS() {
    Cursor mCursor = db.rawQuery("SELECT KEYID " +
                                     " FROM MYDATABASE_TABLE ;", null);


            if (mCursor != null)
            {
            mCursor.moveToFirst();
            }

            return mCursor;
}

Collect it in an array list

ArrayList<String> first = new ArrayList<String>();

cursor1 = db.KEY_IDS();
            cursor1.moveToFirst();
            startManagingCursor(cursor1);

            for (int i = 0; i < cursor1.getCount(); i++) {

                reciv1 = cursor1.getString(cursor1
                        .getColumnIndex(DBManager.Player_Name));

second.add(reciv1);

}

and the fire delete query

for(int i = 0 ;i<second.size(); i++)
{
db.delete(MYDATABASE_TABLE KEYID +"=" + second.get(i) , null);

}