Question

I have a table with registered users, in which i save year as varchar values simply because i take just an year. I want to create pie chart with ages to show which users are more likely to register.

Query below gives me count of user ages which appear more than 5 times in Table to avoid small results. While these small results, below “having ount(userID)>5” i want to appear as others. What should i add to this query or possibly to re-design it. I can create silly solutions like to take all years that appear in initial query and then select all besides those year but there must be better and more creative way of writing this query.

So result will be something like that
1 10 1990
2 4 1980
3 10 others

select count(userID) ageCount,userBirthYear from Users
group by userBirthYear
having count(userID)>5
order by count(userID) desc

thanks

Answer 1

Here’s one way (assuming SQL2005 or later).

With Ages As
(
select count(userID) ageCount,userBirthYear 
from Users
group by userBirthYear
)

SELECT ageCount,userBirthYear FROM Ages WHERE ageCount>5
UNION ALL
SELECT sum(ageCount) ,'others' As userBirthYear FROM Ages WHERE ageCount<=5