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 Select Top n Based on Multiple Variables
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joe_s
Starting Member

1 Posts

Posted - 03/31/2014 :  14:55:57  Show Profile  Reply with Quote
Hi,

Pretty new to SQL here. I have a table that includes Region (1-10), Month, Member ID, and multiple transactions per member (which will be sum of paid). I'd like to extract the top 5 sum of paid amounts....by region, by month, by member. So the resulting query will have 50 results per month (top 5 for each region each month). I've tried in vain to mimic some code I've found online, so any help/input/advice would be very, very much appreciated.

Thank you all.

Joe

James K
Flowing Fount of Yak Knowledge

3873 Posts

Posted - 03/31/2014 :  15:29:12  Show Profile  Reply with Quote
You can use the row_number function with appropriate partitioning and ordering clauses - for example:
;WITH cte AS
(
	SELECT *, 
		ROW_NUMBER() OVER (PARTITION BY region, MONTH, member ORDER BY amount DESC) AS RN
	FROM
		YourTable
) SELECT * FROM cte 
WHERE RN <= 5;
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