GROUP BY in android

Question

что это проблема в этом коде, когда я использую GROUP BY в android. Пожалуйста, проверьте этот код в SQLite:

public void getPlayerName_OrderBy(int First_TeamID) 
{ 
     int Match_ID = get_MatchID();   

     int matchId; 
     int teamID; 
     int PlayerID; 
     String Name; 
     if(Player_SD != null) 
      Player_SD.clear(); 

       String selectQuery = "SELECT "+ STStrikerPlayerName+", count +"("+STStrikerPlayerName+")" +" FROM " +TABLE_SCORE+" where "+ STMatchID +" = '"+ Match_ID +"'"+" AND "  +STFristTeamID + "= '"+First_TeamID+"'"+" GROUP BY "+STStrikerPlayerName; 

     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 

     if (cursor.moveToFirst()) { 
      do { 
       Player_score_details psd = new Player_score_details(); 

       matchId = Integer.parseInt(cursor.getString(0));  
       teamID = Integer.parseInt(cursor.getString(1));          


       PlayerID = Integer.parseInt(cursor.getString(3));     


       Name = cursor.getString(20); 



      } while (cursor.moveToNext()); 
     } 

     db.close();  


} 

Answer 1

вы можете использовать следующие

/** 
    * Selects records from table 
    * 
    * @param table 
    *   = name of table 
    * @param columns 
    *   = String[] for columns 
    * @param where 
    *   = WHERE condition 
    * @param whereargs 
    *   = arguments if where parameter is in prepared statement format 
    * @param groupby 
    *   = GROUP BY column(s) 
    * @param having 
    *   = HAVING condition 
    * @param orderby 
    *   = ORDER BY column witrh asc, desc specification 
    * @return 
    */ 
    public List<Object[]> select(String table, String columns[], String where, 
      String whereargs[], String groupby, String having, String orderby) 
    { 
     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.query(table, columns, where, whereargs, 
       groupby, having, orderby);  
     List<Object[]> list = parseCursorToList(cursor); 
     if (cursor != null && !cursor.isClosed()) { 
      cursor.close(); 
     } 
     return list; 
    } 

Answer 2

Это главное решение ...

общественного недействительными getPlayerName_OrderBy (INT First_TeamID) { INT Match_ID = get_MatchID();

 int matchId; 
     int teamID; 
     int PlayerID; 
     String StrikerName; 
     if(Player_SD != null) 
      Player_SD.clear(); 

     String selectQuery = "SELECT "+STMatchID+","+ STFristTeamID+","+ STStrikerPlayerID +","+ STStrikerPlayerName+", count "+"("+STStrikerPlayerName+")"+" FROM " 
            +TABLE_SCORE+" where "+ STMatchID +" = '"+ Match_ID +"'"+" AND " 
            +STFristTeamID + "= '"+First_TeamID+"'"+" GROUP BY "+STStrikerPlayerName; 

     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 

     if (cursor.moveToFirst()) { 
      do { 
       Player_score_details psd = new Player_score_details(); 

       matchId = cursor.getInt(cursor.getColumnIndex(STMatchID)); 
       psd.MTMID = cursor.getInt(cursor.getColumnIndex(STMatchID)); 

       teamID = cursor.getInt(cursor.getColumnIndex(STFristTeamID));        
       psd.MTID = cursor.getInt(cursor.getColumnIndex(STFristTeamID)); 

       PlayerID = cursor.getInt(cursor.getColumnIndex(STStrikerPlayerID)); 
       psd.MTPID = cursor.getInt(cursor.getColumnIndex(STStrikerPlayerID)); 

       StrikerName = cursor.getString(cursor.getColumnIndex(STStrikerPlayerName)); 
       psd.PlayerName = cursor.getString(cursor.getColumnIndex(STStrikerPlayerName)); 

       Player_SD.add(psd); 

      } while (cursor.moveToNext()); 
     } 

     db.close(); 
}