Python-сообщество

mysql> select author_id, count(*) c from library_books group by author_id having c>2 limit 10;
+---------------+----+
|     author_id | c  |
+---------------+----+
|             0 | 39 |
|          1552 | 17 |
|          1784 |  8 |
|          1876 | 11 |
|          2475 |  5 |
|          2542 | 11 |
|          2597 | 11 |
|          3130 | 12 |
|          3778 | 12 |
|          5831 |  3 |
+---------------+----+