CREATE TABLE table_62138 ("Position" FLOAT, "Club" TEXT, "Played" FLOAT, "Points" FLOAT, "Wins" FLOAT, "Draws" FLOAT, "Losses" FLOAT, "Goals for" FLOAT, "Goals against" FLOAT, "Goal Difference" FLOAT)

What is the highest goal difference of the club with more than 34 played?
SELECT MAX("Goal Difference") FROM table_62138 WHERE "Played" > '34'
SELECT MAX("Goal Difference") FROM "table_62138" WHERE "Played" > '34'