CREATE TABLE table_203_391 (id NUMBER, "season" CLOB, "greek league" CLOB, "greek cup" CLOB, "europe" CLOB, "coach" CLOB, "roster" CLOB)

when was the last appearance in the greek league ?
SELECT MAX("season") FROM table_203_391 WHERE NOT "greek league" IS NULL
SELECT MAX("season") FROM "table_203_391" WHERE NOT "greek league" IS NULL