CREATE TABLE table_204_26 (id DECIMAL, "name" TEXT, "position" TEXT, "birth date/age at start of campaign" TEXT, "games in campaign" TEXT, "club" TEXT)

who was the oldest player ?
SELECT "name" FROM table_204_26 ORDER BY "birth date/age at start of campaign" DESC LIMIT 1
SELECT "name" FROM "table_204_26" ORDER BY "birth date/age at start of campaign" DESC NULLS LAST LIMIT 1