Rolling up remaining rows into one called "Other" - sql

Question

I have written a query which selects lets say 10 rows for this example.
+-----------+------------+
| STORENAME | COMPLAINTS |
+-----------+------------+
| Store1 | 4 |
| Store7 | 2 |
| Store8 | 1 |
| Store9 | 1 |
| Store2 | 1 |
| Store3 | 1 |
| Store4 | 1 |
| Store5 | 0 |
| Store6 | 0 |
| Store10 | 0 |
+-----------+------------+
How would I go about displaying the TOP 3 rows BUT Having the remaining rows roll up into a row called "other", and it adds all of their Complaints together?
So like this for example:
+-----------+------------+
| STORENAME | COMPLAINTS |
+-----------+------------+
| Store1 | 4 |
| Store7 | 2 |
| Store8 | 1 |
| Other | 4 |
+-----------+------------+
So what has happened above, is it displays the top3 then adds the complaints of the remaining rows into a row called other
I have exhausted all my resources and cannot find a solution. Please let me know if this makes sense.
I have created a SQLfiddle of the above tables that you can edit if it is possible :)
Here's hoping this is possible :)
Thanks,
Mike

Answer 1

Something like this may work
select *, row_number() over (order by complaints desc) as sno
into #temp
from
(
SELECT
a.StoreName
,COUNT(b.StoreID) AS [Complaints]
FROM Stores a
LEFT JOIN
(
SELECT
StoreName
,Complaint
,StoreID
FROM Complaints
WHERE Complaint = 'yes') b on b.StoreID = a.StoreID
GROUP BY a.StoreName
) as t ORDER BY [Complaints] DESC
select storename,complaints from #temp where sno<4
union all
select 'other',sum(complaints) as complaints from #temp where sno>=4

Answer 2

I do this with double aggregation and row_number():
select (case when seqnum <= 3 then storename else 'Other' end) as StoreName,
sum(numcomplaints) as numcomplaints
from (select c.storename, count(*) as numcomplaints,
row_number() over (order by count(*) desc) as seqnum
from complaints c
where c.complaint = 'Yes'
group by c.storename
) s
group by (case when seqnum <= 3 then storename else 'Other' end) ;
From what I can see, you don't really need any additional information from stores, so this version just leaves that table out.