CREATE TABLE table_21434618_1 (team__number2 VARCHAR2)

give the 1st leg score against ilisiakos
SELECT 1 AS st_leg FROM table_21434618_1 WHERE team__number2 = "Ilisiakos"
SELECT 1 AS "st_leg" FROM "table_21434618_1" WHERE "Ilisiakos" = "team__number2"