During what years did the Guard from Oklahoma with a height of 6-6 play for the Rockets?
CREATE TABLE "b" (
  "player" text,
  "no_s" text,
  "height_in_ft" text,
  "position" text,
  "years_for_rockets" text,
  "school_club_team_country" text
);
SELECT "years_for_rockets" FROM "b" WHERE "height_in_ft"='6-6' AND "position"='guard' AND "school_club_team_country"='oklahoma';