Почему этот SQL возвращает ноль?

Question

Я не знаю, почему этот SQL не возвращает строк:

SELECT team_rel.team_id
     , team_rel.login_id 
  FROM team_rel
 INNER JOIN team ON team_rel.login_id = team.login_id
 WHERE team.login_id = '39' 
   AND NOT EXISTS (
         SELECT 0 
           FROM team_rel
          INNER JOIN team ON team_rel.login_id = team.login_id 
                         AND team_rel.login_id = '39' 
                         AND team_rel.team_id  = team.id
       )

в то время как следующий SQL (тот же, но без условия NOT EXISTS):

SELECT team_rel.team_id
     , team_rel.login_id 
  FROM team_rel
 INNER JOIN team ON team_rel.login_id = team.login_id
 WHERE team.login_id = '39'

возвращается:

+---------+----------+
| team_id | login_id |
+---------+----------+
|      23 |       39 |
+---------+----------+
|      23 |       39 |
+---------+----------+
|      13 |       39 |
+---------+----------+
|      13 |       39 |
+---------+----------+
|      16 |       39 |
+---------+----------+
|      16 |       39 |
+---------+----------+
|      25 |       39 |
+---------+----------+
|      25 |       39 |
+---------+----------+

и подзапрос NOT EXISTS (тот же SQL с test для team_id) возвращает:

SELECT team_rel.team_id
     , team_rel.login_id 
  FROM team_rel
 INNER JOIN team ON team_rel.login_id = team.login_id
                AND team_rel.login_id = '39'
                AND team_rel.team_id = team.id

возвращается:

+---------+----------+
| team_id | login_id |
+---------+----------+
|      23 |       39 |
+---------+----------+
|      25 |       39 |
+---------+----------+

Я бы хотел, чтобы мой первый выбор вернул:

+---------+----------+
| team_id | login_id |
+---------+----------+
|      13 |       39 |
+---------+----------+
|      16 |       39 |
+---------+----------+

но он не возвращает никаких строк?!

Answer 1

SELECT DISTINCT team_rel.team_id, team_rel.login_id 
FROM team_rel
INNER JOIN team ON team_rel.login_id = team.login_id
WHERE team_rel.login_id = 39
  AND team_rel.team_id NOT IN 
          (SELECT team_id FROM team_rel 
           INNER JOIN team ON team.id = team_rel.team_id AND
                              team.login_id = team_rel.login_id)