Thanks Shaofeng! May u give some hints on how to do this? Thanks again! Best, 
Feng.

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________________________________
发件人: ShaoFeng Shi <[email protected]>
发送时间: Friday, September 28, 2018 10:45:12 PM
收件人: user
主题: Re: Sorting and aggregating at the same time

Hi Feng,

Hmm... it is doable I think, but not a common case.


Francis Liang <[email protected]<mailto:[email protected]>> 
于2018年9月28日周五 下午5:50写道:
Hi guys:

As all know, TOP_N expression can be used in the following scenario:

Select dim_a, sum(metric_a) sum_metric_a from table group by dim_a order by 
sum_metric_a desc limit 100

However, can we sort one metric but aggregate other metrics at the same time, 
like the following scenario:

Select dim_a, sum(metric_a) sum_metric_a,  sum(metric_b) sum_metric_b, 
sum(metric_c) sum_metric_c from table group by dim_a order by sum_metric_a desc 
limit 100

Of course it can be done by just using the normal expression and sort it online 
during query process, but can it be done as a pre-calculation, just like the 
TOP_N? Hope this makes sense.

Thanks guys!

Best, Feng

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Best regards,

Shaofeng Shi 史少锋

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