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11 lines
1.0 KiB
SQL
11 lines
1.0 KiB
SQL
mysql> explain select distinct film.* from sakila.film join sakila.film_actor using(film_id) where film.film_id % 5 = 0;
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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 | SIMPLE | film | ALL | PRIMARY | NULL | NULL | NULL | 951 | Using where; Using temporary |
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| 1 | SIMPLE | film_actor | ref | idx_fk_film_id | idx_fk_film_id | 2 | sakila.film.film_id | 2 | Using index; Distinct |
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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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