像这样的东西.

Select people.id, people.name, count(interest.id)

from people

left join people_interests on people.id = people_interests.peopleid

left join interests on people_interests.interestid = interests.interest.id

where interests.id in (select id from interests where interests.peopleid = @inputuserid)

group by people.id, people.name

order by count(interest.id)

英语(可能会或可能不会更清楚.)

>选择人员姓名和他们共享的兴趣数量

>从人员表

>加入那个表的兴趣表

>只是我们想要匹配的人的利益.

>(按人群分组

>并按匹配的兴趣数量排序.)

更新没有子查询但不太清楚

Select people.id, people.name, count(interest.id)

from people

left join people_interests on people.id = people_interests.peopleid

left join interests on people_interests.interestid = interests.interest.id

inner join interest i2 on (interests.id = i2.id and i2.people_id = @inputuserid)

group by people.id, people.name

order by count(interest.id)