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Q&A for professionals, academics, and students working within the systems development life cycle

--question 1
select top 15
users.id, users.displayname,
count(*) as postcount
from users
join posts on users.id=posts.owneruserid
group by users.id,users.displayname
order by postcount desc;

--question 2
select top 10
users.id, users.displayname,
count(posts.id) as postcount,
count(comments.id) as commentcount,
count(posts.id) + count(comments.id) as totalactivity
from users
join posts on users.id = posts.owneruserid 
join comments on comments.id = comments.userid
group by users.id,users.displayname
order by totalactivity desc;

--question 4
select
(count(*) * 100.0 / (select count(*) from posts)) as percentnocomments
from posts
where id not in 
(
select postid
from comments
)

fork query

edited nov 3

created nov 3 jon.doe46178