更改mysql join结果集中的ID值

Question

我有2张桌子，书籍和genre_order。我试图从books（t1）中选择所有值，并使用JOIN从genre_order（t2）中的order列按流派对它们进行排序。结果集对它们的排序很好，但是，我对如何更改book_id以反映新的顺序感到困惑。

table : books
+-------+------------------+-----------+
|book_id|   name           |   genre   |
+-------+------------------+-----------+
|   1   |   Harry Potter   |  Fantasy  |
|   2   |   The Alchemist  |  Fantasy  |
|   3   |   Inferno        |  Thriller |
|   4   |   Steve Jobs     |  Biography|
|   5   |   John Adams     |  Biography|
+-------+------------------+-----------+


table : genre_order
+-----------+-------+
|   genre   | order |
+-----------+-------+
| Biography |  1    |
| Fantasy   |  2    |
| Thriller  |  3    |
+-----------+-------+

查询：

SELECT * FROM books t1 JOIN genre_order t2 ON t1.genre = t2.genre ORDER BY t2.order ASC

结果：

  +-------+------------------+-----------+-----------+------+
  |book_id|   name           |   genre   |  genre    | order|
  +-------+------------------+-----------+-----------+------+
  |   4   |   Steve Jobs     |  Biography|  Biography|  1   |
  |   5   |   John Adams     |  Biography|  Biography|  1   |
  |   1   |   Harry Potter   |  Fantasy  |  Fantasy  |  2   |
  |   2   |   The Alchemist  |  Fantasy  |  Fantasy  |  2   |
  |   3   |   Inferno        |  Thriller |  Thriller |  3   |
  +-------+------------------+-----------+-----------+------+

预期结果：

  +-------+------------------+-----------+------+
  |book_id|   name           |   genre   | order|
  +-------+------------------+-----------+------+
  |   1   |   Steve Jobs     |  Biography|  1   |
  |   2   |   John Adams     |  Biography|  1   |
  |   3   |   Harry Potter   |  Fantasy  |  2   |
  |   4   |   The Alchemist  |  Fantasy  |  2   |
  |   5   |   Inferno        |  Thriller |  3   |
  +-------+------------------+-----------+------+

是否可以在结果集中更改book_id？另外，如何避免多余的列？