Петр

window['balance'] = ...
// или
window.balance = ...

select if(CONCAT(year(ph.created), '_', week(ph.created)) = dt.cr, -1, 
          if(CONCAT(year(ph.created), '_', week(ph.created)) = dt.nx, -2, (year(ph.created) * 100) + week(ph.created)))  t
  from test ph
inner join (select CONCAT(year(now()), '_', week(now())) cr,
            CONCAT(year(now()), '_', week(now()) + 1) nx from dual) dt on 1=1
order by t

return render_to_response('help.xtpl', {}, 
                              context_instance = RequestContext(request))