28. SELECT res3.name, res3.team, res2.cnt
FROM (SELECT res1.user_key, COUNT
(DISTINCT(res1.team)) AS cnt FROM (SELECT
t1.user_key AS user_key, t2.team AS team
FROM qr_checkin_log AS t1 INNER JOIN
user_info AS t2 ON
(t1.target_key=t2.ckey) WHERE
t1.type='user') AS res1 GROUP BY
res1.user_key ORDER BY cnt DESC LIMIT 5)
AS res2 INNER JOIN user_info AS res3 ON
(res2.user_key=res3.ckey)