Question: How many years did Barclay Nordica Arrows BMW enter with Cosworth V8 engine?
SQL: SELECT SUM("Year") FROM "2-1226338-2" WHERE "Entrant" = 'Barclay Nordica Arrows BMW' AND "Engine" = 'Cosworth V8';

Question: How many years did barclay nordica arrows bmw enter with a bmw str-4 t/c engine with less than 1 point?
SQL: SELECT SUM("Year") FROM "2-1226338-2" WHERE "Engine" = 'bmw str-4 t/c' AND "Entrant" = 'barclay nordica arrows bmw' AND "Points" < 1.0;

Question: How many years was Ensign N180B a Chassis with 4 points?
SQL: SELECT SUM("Year") FROM "2-1226338-2" WHERE "Points" = 4.0 AND "Chassis" = 'Ensign N180B';