sql - 在sql查询中过滤计数结果

Question

如何过滤下面查询中的计数列以仅显示计数 > 1 的行？

select FirstName, COUNT(*) as [CountTickets] from tblParkingTickets
group by FirstName  
order by [CountTickets] desc

这不起作用：

select FirstName, COUNT(*) as [CountTickets] from tblParkingTickets
where [CountTickets] > 1
group by FirstName  
order by [CountTickets] desc

谢谢

score 7 · Accepted Answer

与HAVING：

HAVING COUNT(*) > 1

WHERE在 group by 之前过滤（因此COUNT没有任何意义）。HAVING分组后过滤。

score 0 · Accepted Answer

select * from (select FirstName, COUNT(*) mycount from tblParkingTickets
group by FirstName  
order by 2 desc) where mycount > 1

试试这个

2 回答 2