在MySQL中使用STRAIGHT_JOIN的教程

SELECT post.
FROM post
INNER JOIN post_tag ON post.id = post_tag.post_id
WHERE post.status = 1 AND post_tag.tag_id = 123
ORDER BY post.created DESC
LIMIT 100

+----------+---------+-------+-----------------------------+
| table  | key   | rows | Extra            |
+----------+---------+-------+-----------------------------+
| post_tag | tag_id | 71220 | Using where; Using filesort |
| post   | PRIMARY |   1 | Using where         |
+----------+---------+-------+-----------------------------+

SELECT post.
FROM post
STRAIGHT_JOIN post_tag ON post.id = post_tag.post_id
WHERE post.status = 1 AND post_tag.tag_id = 123
ORDER BY post.created DESC
LIMIT 100

+----------+----------------+--------+-------------+
| table  | key      | rows  | Extra    |
+----------+----------------+--------+-------------+
| post   | status_created | 119340 | Using where |
| post_tag | post_id    |   1 | Using where |
+----------+----------------+--------+-------------+