2013 Lost connection to MySQL server during query
in:
[select b.banners_id, b.expires_date, b.expires_impressions, sum(bh.banners_shown) as banners_shown from banners b, banners_history bh where b.status = 1 and b.banners_id = bh.banners_id group by b.banners_id, b.expires_date, b.expires_impressions]

in:
[select count(*) as total from sessions where sesskey = 'u0rlr8eghljmf2mb69u51bekn2']