CREATE TABLE table_203_145 (id NUMBER, "position" NUMBER, "club" CLOB, "played" NUMBER, "points" CLOB, "wins" NUMBER, "draws" NUMBER, "losses" NUMBER, "goals for" NUMBER, "goals against" NUMBER, "goal difference" NUMBER)

how many clubs had a positive goal difference ?
SELECT COUNT("club") FROM table_203_145 WHERE "goals for" - "goals against" > 0
SELECT COUNT("club") FROM "table_203_145" WHERE "goals for" - "goals against" > 0