从资产数据库中检索数据

Question

我试图使用2个表获取信息，但检索信息始终来自comm_stp。如何设法分别从多个表中获取信息？

public Cursor getData() {  

    String myPath = DB_PATH + DB_NAME;  
    db = SQLiteDatabase.openDatabase(myPath, null,  
    SQLiteDatabase.OPEN_READWRITE);  
    onUpgrade(db, DB_Version, 4);

    Cursor c = db.rawQuery("SELECT * FROM comm_filems, comm_stp", null);  
    return c;  
}