CREATE TABLE table_name_42 (points NUMBER, year VARCHAR2, class VARCHAR2)

What is the sum of Points, when Year is after 1959, and when Class is 250cc?
SELECT SUM(points) FROM table_name_42 WHERE year > 1959 AND class = "250cc"
SELECT SUM("points") FROM "table_name_42" WHERE "250cc" = "class" AND "year" > 1959