Failed Query: Select sum(tot_playings) tot from (select ifnull(count(playings.sc_id),0)+ifnull(side1wins,0)+ifnull(side2wins,0) tot_playings,night,pubs.id pid,pubs.intro,theatre,scen_date,scen_location,time_to_play,gps_long,gps_lat,scenario.sc_id,scenario.id,title,pubs.publish_id,publishers.publisher_name publ,pubs.pub_name n,attacker,defender from publishers,pubs,scenario left join playings on playings.sc_id=scenario.id left join roardata on roardata.scen_name=scenario.title where pubs.publish_id=publishers.publisher_id and pubs.id=scenario.pub_id and pubs.id='815' group by scenario.id order by a desc)s