连接三个联结表

Question

试图弄清楚这一点让我头疼！

我有三张桌子 -玩家 -团队 -游戏

具有两列的三个联结表。 -player_teams -teams_games -player_games

我需要列出所有未分配团队（在此游戏中）的游戏中的玩家（例如：变量中的 Game_id = 111）。我称他们为孤儿玩家

基本上得到在比赛中的球队，得到他们的球员并与 Games_players 反向比赛。或者我想反过来。

我试了两天没有运气！

谢谢！

/J p.s 在我发布此内容后，我已经走到了这一步，但它似乎很复杂！

SELECT * from players
JOIN
(SELECT DISTINCT games_players.player_id from games_players
Left JOIN
(Select team_players.player_id p1 from team_players 
inner join (Select * from games_teams where games_teams.game_id = :P1) AS tm1 ON team_players.team_id = tm1.team_id) As f1
On games_players.player_id = f1.p1
where p1 is null) as q1
on players.player_id = q1.player_id

Answer 1

由于给出了比赛，你可以只看比赛中的球员和比赛中球队的球员：

select *
from players
where player_id in
(
  select player_id
  from player_games
  where game_id = 111
)
and player_id not in
(
  select pt.player_id
  from player_teams pt
  join teams_games tg using (team_id)
  where tg.game_id = 111
);