helper = new ccmap_db(this, null, null, 0);   
import com.skcc.ccmaptest3.*;
 public ArrayList<String> getCards(){   
         SQLiteDatabase db = helper.getReadableDatabase();   
         Cursor cursor = db.rawQuery("select * from store_info where store_no=7", null);  
         Cursor cursor1 = db.rawQuery("select * from card_info where card_no=7", null); 
         Cursor cursor2 = db.rawQuery("select * from benefit_1 where pk_no in (select distinct(pk_no.PK_NO) from store_info,pk_no where " +
           " pk_no.PK_NO in(select pk_no.PK_NO from store_info,pk_no where store_info.store_no=pk_no.store_no" +
           " and pk_no.card_no=14 and pk_no.store_no=7))", null); 
         ArrayList<String> list = new ArrayList<String>();   
         while (cursor.moveToNext()){   
             list.add(cursor.getString(1));   
         }
         while (cursor1.moveToNext()){   
             list.add(cursor1.getString(1));   
         }
         while (cursor2.moveToNext()){   
             list.add(cursor2.getString(1));   
         }
         return list;   
     }