当X = Y被Y分组时，如何求和？

Question

我正在尝试编写一个查询，说明如果all1o1s和SC.salesforce_id中存在ID，然后求和它在all1o1s中存在的次数。

我写道：

select 
   sc.salesforce_id,
   sum(case when all1o1s.member_id = sc.salesforce_id then 1 else 0) as "1o1 completed count"
from salesforce_contacts as sc 
inner join leenk_1o1s as all1o1s on sc.salesforce_id = all1o1s.member_id    
group by sc.salesforce_id;

我在求和线上出现错误。如何构造此查询？

谢谢！

Answer 1

尝试一下

 select b.salesforce_id,count(1) from all1o1s a,salesforce_contacts b where a.id=b.salesforce_id
group by b.salesforce_id having count(1) > 1

根据您的问题，您无需计数即可