What are the most laps for the Qual position of 7 in the OC class?
CREATE TABLE "official_results" (
  "class" text,
  "team" text,
  "drivers" text,
  "laps" real,
  "qual_pos" real
);
SELECT MAX("laps") FROM "official_results" WHERE "class"='oc' AND "qual_pos"=7;