  select c_nation, s_nation, d_year, sum(lo_revenue) as revenue
    from customer, lineorder, supplier, "date"
   where lo_custkey = c_custkey
     and lo_suppkey = s_suppkey
     and lo_orderdate = d_datekey
     and c_region = 'ASIA' and s_region = 'ASIA'
     and d_year >= 1992 and d_year <= 1997
group by c_nation, s_nation, d_year
order by d_year asc, revenue desc;
