ยา 3 ชนิดที่สั่งจ่ายบ่อยที่สุดในปี 2104 คือยาอะไร ไม่จำเป็นต้องใช้ทุกตาราง
what are the three drugs that are prescribed the most frequently in 2104?It is not neccessary to use all the tables.
 treatment:  treatmentid [ number]  patientunitstayid [ number]  treatmentname [ text]  treatmenttime [ time] 
SELECT t1.drugname FROM (SELECT medication.drugname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM medication WHERE STRFTIME('%y', medication.drugstarttime) = '2104' GROUP BY medication.drugname) AS t1 WHERE t1.c1 <= 3