พยาบาลคนไหนมีนัดมากที่สุด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมดค่ะ
What is the name of the nurse has the most appointments?It is not neccessary to use all the tables.
 nurse:  (name [ VARCHAR ] employeeid [ VARCHAR) ]
SELECT T1.name FROM nurse AS T1 JOIN appointment AS T2 ON T1.employeeid = T2.prepnurse GROUP BY T1.employeeid ORDER BY COUNT(*) DESC LIMIT 1