QBE Processor--Query Result

SQL QUERY IS:

select parts_0.pname, parts_0.color
from   parts parts_0, catalogue catalogue_0, catalogue catalogue_1
where  parts_0.pid = catalogue_0.pid and
       parts_0.pid = catalogue_1.pid and
       catalogue_0.pid = catalogue_1.pid and
       catalogue_0.sid <> catalogue_1.sid

QUERY RESULT IS:

PNAME COLOR

nut red

bolt green

screw red