m90 มีขนาดปรากฏสูงหรือต่ำกว่า m63 หรือไม่ ไม่จำเป็นต้องใช้ตารางทั้งหมด
does m90 have a higher or lower apparent magnitude than m63 ?It is not neccessary to use all the tables.
 table_203_569:  id [ number]  "designation" [ text]  "classification" [ text]  "constellation" [ text] 
SELECT (SELECT "apparent magnitude" FROM table_203_569 WHERE "designation" = 'm90') > (SELECT "apparent magnitude" FROM table_203_569 WHERE "designation" = 'm63')