Need help again about joining tables

Question

some context I asked a question about a MySQL request, my post can be found there: Need help about joining tables

Now I have another problem related to that, so on my pa

Answer 1

Instead of filtering on an exact userid, you should check if the user is related to the issue, like this:

select
  t.title,
  group_concat(
    case when tu.type = 1 then 
      concat(u.firstname, ' ', u.lastname)
    end) as creator,
  t.priority,
  t.date,
  group_concat(
    case when tu.type = 2 then 
      concat(u.firstname, ' ', u.lastname)
    end SEPARATOR ' - ') as users
from
  tickets t
  inner join tickets_users tu on tu.ticketid = t.id
  inner join users u on u.id = tu.userid
where 
  exists (
    select 
      'x' 
    from 
      tickets_users tu2 
    where 
      tu2.ticketid = t.id and 
      tu2.userid =  and 
      tu2.type = 1)
group by
  t.id;

For you can fill in the user id you want. This query will return all issues that are reported by that user (type = 1). But for all those issues, still all related users are returned, so your query result is still complete.