SQL中的替换和分组依据

Question

您好我希望通过替换字符的字段对结果进行分组，但也保留原始值。

这是我有，但我需要返回原始的URL值，而不会改变结果。

select Count(ID) as TotalClicks, Replace(URL, '/', '') as DistinctURL 
    from email_click_throughs 
where emailid = @ID 
group by Replace(URL, '/', '') 
order by TotalClicks desc 

Answer 1

这会给你你所描述的，但它是在分组“替换（URL ......”多余的，所以我可能会误解：

select Count(ID) as TotalClicks, URL as DistinctURL 
from email_click_throughs 
where emailid = @ID 
group by Replace(URL, '/', ''), URL 
order by TotalClicks desc 

如果你只是想获得回一个网址，即使两者进行去除后“/”相当于，你可以不喜欢

select Count(ID) as TotalClicks, Max(URL) as DistinctURL 
from email_click_throughs 
where emailid = @ID group by Replace(URL, '/', '') 
order by TotalClicks desc 

但在这你“匹配”的是越来越下降了，你没有太多的控制权。