Table schema:
CREATE TABLE table_name_41 (years_for_rockets VARCHAR, school_club_team_country VARCHAR, height_in_ft VARCHAR, position VARCHAR)

Question: During what years did the Guard from Oklahoma with a height of 6-6 play for the Rockets?
SQL: SELECT years_for_rockets FROM table_name_41 WHERE height_in_ft = "6-6" AND position = "guard" AND school_club_team_country = "oklahoma"