126 Incorrect key file for table './crawlerx_new1/zen_banners_history.MYI'; try to repair it
in:
[select b.banners_id, b.expires_date, b.expires_impressions, sum(bh.banners_shown) as banners_shown from zen_banners b, zen_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]