true prefix oplsioc: prefix sioc: prefix foaf: select ?l+>tpch:returnflag, ?l+>tpch:linestatus, sum(?l+>tpch:linequantity) as ?sum_qty, sum(?l+>tpch:lineextendedprice) as ?sum_base_price, sum(?l+>tpch:lineextendedprice*(1 - ?l+>tpch:linediscount)) as ?sum_disc_price, sum(?l+>tpch:lineextendedprice*(1 - ?l+>tpch:linediscount)*(?l+>tpch:linetax)) as ?sum_charge, avg(?l+>tpch:linequantity) as ?avg_qty, avg(?l+>tpch:lineextendedprice) as ?avg_price, avg(?l+>tpch:linediscount) as ?avg_disc, count(1) as ?count_order from where { ?l a tpch:lineitem . filter (?l+>tpch:shipdate <= bif:dateadd ("day", 90, '1998-12-01'^^xsd:date)) } order by ?l+>tpch:returnflag ?l+>tpch:linestatus ]]>http://demo.openlinksw.com/tpchsoft/sparql