CREATE TABLE table_42265 ("Year" FLOAT, "Competition" TEXT, "Venue" TEXT, "Position" TEXT, "Event" TEXT)

What is the sum of Year(s), when Postion is 6th, and when Competition is Commonwealth Games?
SELECT SUM("Year") FROM table_42265 WHERE "Position" = '6th' AND "Competition" = 'commonwealth games'
SELECT SUM("Year") FROM "table_42265" WHERE "Competition" = 'commonwealth games' AND "Position" = '6th'