CREATE TABLE table_272865_20 (years_active VARCHAR, asian_cup_played_as_a_captain VARCHAR)

What were the years active where Asian Cup played as a captain is Qatar 1988?
SELECT years_active FROM table_272865_20 WHERE asian_cup_played_as_a_captain = "Qatar 1988"
SELECT "years_active" FROM "table_272865_20" WHERE "Qatar 1988" = "asian_cup_played_as_a_captain"