我如何获得状态名称上的成员数量

Question

我有member表member_Id

一个mmship表，其中包含mmshipstart date和member_Id以及mshipstatus_Id

列

另一个包含mshipstatustype列和mshipstatus_Id

列的表mshipstatus_name

我的mshipstatus_name行值为prospective ......

如何获得members(count) mshipstatusname每月prospective的数量mmshipstart date

我可以从{{1}}开始计算。

任何人都可以帮助我......

我是新手加入任何人都会帮助......

Answer 1

以下应该可以解决问题：

SELECT COUNT(*)
FROM member inner join mmship
   ON member.member_Id = mmship.member_Id
   INNER JOIN mshipstatus
   ON mshipstatus.mshipstatus_Id = mmship.mshipstatus_Id
WHERE mshipstatus.mshipstatusname = 'prospective'
   AND MONTH(mmship.mmshipstart_date) = MONTH(GETDATE())

（您可以使用其他日期更改getdate（））。

Answer 2

select count(*) as prospective from mshipstatustype t1 join mmship t2 where t1.mshipstatus_id=t2.mshipstatus_id and t2.mshipstatus_name="prospective" group by year(mmshipstart_date), month(mmshipstart_date)

做你想做的事吗？