ยาที่พบบ่อยที่สุดห้าชนิดที่กำหนดจนถึงปี 2102 คืออะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
what were the five most common drugs prescribed until 2102?It is not neccessary to use all the tables.
 icustays:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icustay_id [ number]  first_careunit [ text]  last_careunit [ text]  first_wardid [ number]  last_wardid [ number]  intime [ time]  outtime [ time] 
SELECT t1.drug FROM (SELECT prescriptions.drug, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM prescriptions WHERE STRFTIME('%y', prescriptions.startdate) <= '2102' GROUP BY prescriptions.drug) AS t1 WHERE t1.c1 <= 5