Mysql 有口才的地方有慢商量

我试着与有口才的人商量，但速度很慢。 我的代码

SQL生成

select  *
    from  `users`
    where  `users`.`deleted_at` is null
      and  
      ( SELECT  count(*)
            from  `friends` as `self_04b17053094a40fb70514325b892fc19`
            where  `users`.`deleted_at` is null
              and  `self_04b17053094a40fb70514325b892fc19`.`user_id` = `users`.`id`
              and  `friend_id` = '1'
              and  `state` = 'accepted'
              and  `users`.`deleted_at` is null
      ) >= 1
    order by  `name` asc
    limit  16

---

你的问题是？我相信更多的是sql问题。您是否尝试过在复合键上创建索引？最近在Laravel 5.2中对其进行了优化，因此如果您进行升级，您应该会获得更好的性能，特别是在PostgreSQL和SQLServer中。

select  *
    from  `users`
    where  `users`.`deleted_at` is null
      and  
      ( SELECT  count(*)
            from  `friends` as `self_04b17053094a40fb70514325b892fc19`
            where  `users`.`deleted_at` is null
              and  `self_04b17053094a40fb70514325b892fc19`.`user_id` = `users`.`id`
              and  `friend_id` = '1'
              and  `state` = 'accepted'
              and  `users`.`deleted_at` is null
      ) >= 1
    order by  `name` asc
    limit  16