Uni # ใดมีนามสกุล ough ไม่จำเป็นต้องใช้ทุกตาราง
Which Uni # has a Surname of ough?It is not neccessary to use all the tables.
 table_name_40:  (uni_number [ VARCHAR ] surname [ VARCHAR) ]
SELECT uni_number FROM table_name_40 WHERE surname = "ough"