-- 优化前,查询10005条,摒弃10000条,留下5条
SELECT
film_id,
description
FROM
film
ORDER BY
title
LIMIT 10000, 5;
-- 优化优化后写法,具体是如何起到优化效果的呢?
SELECT
film.film_id,
film.description
FROM
film
INNER JOIN ( SELECT film_id FROM film ORDER BY title LIMIT 10000, 5 ) AS tmp USING ( film_id );
mysql 优化limit写法
猜你喜欢
转载自blog.csdn.net/qq_39822451/article/details/85698816
今日推荐
周排行