SELECT nickname, password, user_id
FROM users
WHERE nickname='#session.nickname#'
AND password='#session.password#'
AND venue_user = '0'
OR venue_user =''
SELECT *
FROM artist_info
WHERE user_id=#check_login.user_id#
SELECT *
FROM event_2
WHERE user_id=#check_login.user_id#
AND artist_id IS NOT NULL