在我的MySQL数据库中，我有4个表：jtbl_users，wat_team，wat_league，wat_team_member。我需要运行一个查询，以提取一组团队成员的列表，以显示他们所在的团队以及该团队分配给的league_code。可以将一个团队成员分配给多个团队。
我无法将league_code与每个团队进行匹配，如果一个团队成员在多个团队中，则只会拉出该团队成员最近加入的league_code。< / p>
我必须从wat_team_member表中提取，该表不包含league_id，league_id' is in the wat_team`表。
`jtbl_users`
=============
id | name
1012 | James
1067 | Steve
1133 | Lisa
`wat_league`
=============
id | league_name | code
793 | Southeast County | x1234fr
678 | North County | df987gt
`wat_team`
=============
id | team_name | league_id | league_code
36 | Jawhawks | 793 | x1234fr
50 | Clippers | 678 | df987gt
62 | Bears | 793 | x1234fr
`wat_team_member`
=============
id | user_id | team_id
1 | 1012 | 36
2 | 1067 | 36
3 | 1067 | 50
4 | 1133 | 62
SELECT
jtbl_users.name,
wat_team.team_name,
wat_league.league_code
FROM wat_team_member
LEFT JOIN jtbl_users ON jtbl_users.id = wat_team_member.user_id
LEFT JOIN wat_team ON wat_team.id = wat_team_member.team_id
LEFT JOIN wat_league ON wat_league.id IN (SELECT league_id FROM wat_team WHERE wat_team_member.team_id = wat_team.id)
WHERE jtbl_users.id = 1067
返回：
name | team_name | league_code
--------------
Steve | Jawhawks | df987gt
Steve | Clippers | df987gt
但是需要：
name | team_name | league_code
--------------
Steve | Jawhawks | x1234fr
Steve | Clippers | df987gt