如何在Android的SQLite数据库中运行查询？

final Cursor cursor = db.rawQuery("SELECt SUM(odometer) as odometer FROM tripmileagetable where date like '2012-07%';", null);int sum = 0;if (cursor != null) {    try {        if (cursor.moveToFirst()) { sum = cursor.getInt(0);        }    } finally {        cursor.close();    }}