小编clo*_*000的帖子

我有查询需要40秒才能执行,我想知道如何让它更快......

SELECT rp.`id` as rip,r.`id`, 
  rl.`id` as rlid, r.`number`, r.`type`, 
  a.`title` as atitle, a.`id` as aid, more, 
  more_valid 
FROM 
  `R_l_p` rp INNER JOIN 
  `Rl` rl ON rp.`rl_id` = rl.`id` INNER JOIN 
  `R` r ON r.`id` = rl.`r_id` INNER JOIN 
  `A` a ON a.`id` = r.`a_id` 
  LEFT JOIN 
   (SELECT `type`, `v`, `r_id`, COUNT(*) AS more 
    FROM `R_l` 
    WHERE `type` = 'stream' AND `v` = 1 
    GROUP BY `r_id`) stm ON stm.`r_id` = r.`id`
  LEFT JOIN 
   (SELECT `type`, `v`, `r_id`, COUNT(*) AS …