USC เข้าร่วมกี่รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
In how many rounds did USC participate in?It is not neccessary to use all the tables.
 table_name_72:  (round [ VARCHAR ] college [ VARCHAR) ]
SELECT COUNT(round) FROM table_name_72 WHERE college = "usc"