Mysql 10,11,12,13,3谢谢！工作几乎完美无缺，但如果表几乎满了，它只返回2个审阅者，而不是3个！我认为这是因为你的代码认为：如果A评论B，那么B评论A，但这不是它应该如何工作的！更多的帮助将不胜感激：）我所做的是，如果需要3次审查，并且1人已经审查了该

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10,11,12,13,3谢谢！工作几乎完美无缺，但如果表几乎满了，它只返回2个审阅者，而不是3个！我认为这是因为你的代码认为：如果A评论B，那么B评论A，但这不是它应该如何工作的！更多的帮助将不胜感激：）我所做的是，如果需要3次审查，并且1人已经审查了该项目，它将随机返回2名审查者。或者，如果2个已经审核，它将返回1个随机审核人。你在寻找什么不同？如果某人A没有被任何人“审阅”，它有时只返回2个人作为A的审阅者。你能描述一下生成该行为的设置吗？是的：审阅（你的脚本已经生成了3条记录）（id，code|reviewer）：10,3 | 13,3 | 12,3 |用户（id）：10,11,12,13，3谢谢！

*--------------------*
| ID | CODE_REVIEWER |
*--------------------*
| 1  |    2          |
| 1  |    3          |
| 1  |    4          |
*--------------------*

*----*
| ID |
*----*
| 1  |
| 2  |
| 3  |
| 4  |
| 5  |
*----*

*-----------*
| REVIEWER  |
*-----------*
|     4     |
|     1     |
|     5     |
*-----------*

*-----------*
| REVIEWER  |
*-----------*
|     1     |
|     5     |
|     3     |
*-----------*

*-----------*
| REVIEWER  |
*-----------*

select newid from (select id, count(*) as num from (select * from users
where id != ?) as users group by id order by RAND() LIMIT ?) as sb
where num < 3 and newid not in (select code_reviewer from reviews where id = ?)

*---*
| 2 |
| 1 |
| 2 |
*---*

declare @userId int
select @userId = 1
declare @existingReviewCount int
select @existingReviewCount = COUNT(*) from Reviews where Id = @userId
declare @requiredRowCount int
select @requiredRowCount = 3 - @existingReviewCount

select top (@requiredRowCount) Id from Users
where @userId != Id
order by NEWID()

select u.*, 
    -- r_counts.cnt as reviews_count,
    substring_index(
        group_concat(u_rev.id order by rand()),
        ',',
        greatest(3-r_counts.cnt,0)) as reviewers
from users u
join users u_rev on u.id != u_rev.id
left join (
    select u.id, count(r.id) as cnt
    from users u
    left join reviews r on u.id = r.id
    group by u.id
) r_counts on r_counts.id = u.id
left join (
    select u.id, count(r.id) as cnt
    from users u
    left join reviews r on u.id = r.reviewer
    group by u.id, r.reviewer
) as did_review_counts
on did_review_counts.id = u_rev.id
where u.id = 11
and did_review_counts.cnt < 3
group by u.id;