Table: roster_stats_5
Columns: player
no_s
height_in_ft
position
years_for_rockets
school_club_team_country

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 roster_stats_5 WHERE "height_in_ft" = '6-6' AND "position" = 'guard' AND "school_club_team_country" = 'oklahoma'