[英]What sql formula am I missing?
嘗試:
select name , count(checkinpk)
.....
group by name , count(checkinpk)
你可以試試下面:
select name, COUNT(C.LocID) as Checkin_Count
from location AS L
inner join checkin as C on C.LocID= L.LocID
group by name
order by COUNT(C.LocID) desc
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