mysql> explain select * from (select * from sakila.film_actor where film_id = 1) as x;
+----+-------------+------------+------+----------------+----------------+---------+------+------+-------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+------------+------+----------------+----------------+---------+------+------+-------+
| 1 | PRIMARY | <derived2> | ALL | NULL | NULL | NULL | NULL | 10 | |
| 2 | DERIVED | film_actor | ref | idx_fk_film_id | idx_fk_film_id | 2 | | 10 | |
+----+-------------+------------+------+----------------+----------------+---------+------+------+-------+
2 rows in set (0.01 sec)
mysql> notee
|