The effectiveness of heating of housing unit by renewable energy source

doi:10.17221/44/2016-RAE

Database error: Invalid SQL: select distinct snid, insdate, actdate, deactdate, typeclass, ctx, artkey, aname, urlname, linkto from (select sn.snid, date_format(sn.insdate, '%e.%c.%Y') as insdate, date_format(sn.actdate, '%e.%c.%Y') as actdate, date_format(sn.deactdate, '%e.%c.%Y') as deactdate, sn.typeclass, sn.ctx, sn.artkey, cn.ctx as aname, stripCZ(cn.ctx) as urlname, sn.linkto from sawss sw join shortacts sn using (snid) left outer join ctx cn on (cn.artkey=sn.artkey and type = 2) where sw.wsid in ('rae','mag','all') and sn.satype in (1) and sn.actdate <= now() and sn.deactdate > now() and (showmode = 0 or ((showmode & 1) > 0)) group by sn.snid, insdate, actdate, deactdate, sn.typeclass, sn.ctx, sn.artkey, aname, urlname, sn.linkto order by sn.actdate desc, rand() limit 0, 4) q
MySQL Error: 2006 (MySQL server has gone away)
Session halted.