计算值的总发生次数

Question

我想查找商店开业时的员工人数

select COUNT(e.employeeID) as PunchCount
from StoreMonitoring as s
inner join
EmployeeInAndOut as e on e.storeMonitoringID=s.storeMonitoringID 
where s.businessstarttime= (e.punchTime) and s.storeMonitoringID='12we'
group by e.employeeID

我想要这样

Total Emp At Open 
----------------- 
3   

我如何实现这一目标？

Answer 1

如果您想要员工的数量，请从组中删除e.employeeID并最终添加s.storeMonitoringID

select s.storeMonitoringID, COUNT(e.employeeID) as PunchCount
from StoreMonitoring as s
inner join 
EmployeeInAndOut as e on e.storeMonitoringID=s.storeMonitoringID 
where s.businessstarttime= (e.punchTime) and s.storeMonitoringID='12we'
group by s.storeMonitoringID