Skip to content
Advertisement

How do I find the number of video games with more than 5 developers. (SQL query)

Lets say i have 2 tables which are videogames and developers.

Under the videogames table, we have the following attributes:

  • videogameid(PK)
  • title
  • dateOfRelease

Under the developer table, we have attributes:

  • developerid(PK)
  • name
  • position

I tried finding the total number of videogames that had more than 5 developers. Here is my attempt to resolve the issue.

SELECT COUNT(videogameid)
FROM videogames, developers
WHERE videogameid = developerid
GROUP BY developerid
HAVING COUNT(developerid) > 5; 

While I did not get any error issues but no results popped up.The result was null and not even zero.Hence i might have done something wrong.

EDIT: Yes there is one more table that actually relates to them it was videogames2developers which has the following attributes:

-videogameid
-developerid
-genre

Advertisement

Answer

The bridge table videogames2developers suffices for this task. First get all video games with more than five developers, then count how many these are.

select count(*)
from
(
  select videogameid
  from videogames2developers 
  group by videogameid
  having count(*) > 5
) games_with_more_than_five_devs;

This assumes that there is one entry per game and developer in the table. If this is not the case, then replace having count(*) > 5 by having count(distinct developerid) > 5.

User contributions licensed under: CC BY-SA
5 People found this is helpful
Advertisement