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11 lines
805 B
SQL
11 lines
805 B
SQL
mysql> explain select actor_id, (select count(film_id) from sakila.film) from sakila.actor;
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+----+-------------+-------+-------+---------------+--------------------+---------+------+------+-------------+
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| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
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+----+-------------+-------+-------+---------------+--------------------+---------+------+------+-------------+
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| 1 | PRIMARY | actor | index | NULL | PRIMARY | 2 | NULL | 200 | Using index |
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| 2 | SUBQUERY | film | index | NULL | idx_fk_language_id | 1 | NULL | 951 | Using index |
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+----+-------------+-------+-------+---------------+--------------------+---------+------+------+-------------+
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2 rows in set (0.00 sec)
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mysql> notee
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