CREATE TABLE table_203_242 (id DECIMAL, "season" TEXT, "competition" TEXT, "round" TEXT, "club" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

how long has fc shakhtyor salihorsk been playing in europe ?
SELECT MAX("season") - MIN("season") + 1 FROM table_203_242
SELECT MAX("season") - MIN("season") + 1 FROM "table_203_242"