Select highest ranked group only

So im trying to make a integration between my XenForo forum and Source Mod (Counter Strike mod). XenForo saves the user groups a member is a member of like this.

| user_id | user_group_id | is_primary |

That means some members is in that table more then 1 time, in the result I want to have one row of every member max and it should containt the users highest ranked group.

Im not very experienced with this kind of sql queries so I would be glad if someone could help me with this.

The groups i want to have in the result is 5-12, 5 is highest ranked and 12 is lowest ranked. All other groups should not be in the result.

A few rows from the 开发者_开发百科table

user_id | user_group_id | is_primary
1 | 2 | 1
1 | 3 | 0
1 | 4 | 0
1 | 5 | 0
2 | 2 | 1
2 | 5 | 0
3 | 2 | 1
4 | 2 | 1
4 | 6 | 0

EDIT: The result I want would look like this If the table only contained the rows above.

user_id | user_group_id
1 | 5
2 | 5
4 | 6

Best regards

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Typing this off the top, but it should do the job:

SELECT user_id, ΜΙΝ(user_group_id) AS min_group_id
FROM users
WHERE user_group_id >= 5 && user_group_id <= 12
GROUP BY user_id

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select user_id, min(user_group_id)
from xf_user_group_relation
where max_group_id between 5 and 12
group by user_id