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I have the following tables

A User table with column names (UserId,Name,email)

A Videos table with column names (UserId,VideoLink)

An Activity table with column names (UserId,Status) if status=0 likes,if status=1 disliked

I want to get the following result

Name, Total_Videos_posted_by_that_user, count(Likes), count(dislikes)

How can i Query them in a single Query?

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1 Answer 1

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select u.name, 
       videocount, 
       dislikes,
       likes
from user u
left join 
(
  select u.name, count(v.videolink) as videocount
  from user u
  inner join videos v on v.userid = u.userid
) x on x.name = u.name
left join 
(
  select u.name, 
         sum(a.status=1) as dislikes,
         sum(a.status=0) as likes
  from user u
  inner join activity a on a.userid = u.userid
) y on y.name = u.name

SQLFiddle demo

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6 Comments

Are you sure that sum(status=1) or count(a.Status=1)?
I am getting correct data if i use select u.name,count(v.videolink) as videocount from user u left join videos on u.userid=v.userid group by u.Name If i include another table as you mentioned activity, It gives incorrect result
I am sure it is sum(status=1) You want to count the dislikes only, right?
Ya i want to count both dislikes and likes. Ok even though i try to get dislikes count as you mentioned it returns incorrect data. Example user name John have 19 videos if i query till video count. If i include Dislikes query then it shows 142 as video count. and unfortunately dislikes count is also showing 142. But thats not the correct data it should be 6
It says Column 'Status' in field list is ambiguous
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