SELECT u.uid, u.city, u.username, u.flag
FROM users u
JOIN groupmember g ON u.uid = g.uid
WHERE u.city = 'Tokyo'
AND g.groupid = 16;
SELECT u.uid, u.city, u.username, u.flag
FROM users u
JOIN groupmember g ON u.uid = g.uid
WHERE u.city = 'Tokyo'
AND g.groupid = 16;