ยาที่สั่งจ่ายบ่อยที่สุดห้าอันดับแรกในปีนี้คืออะไร? ไม่จำเป็นต้องใช้ตารางทั้งหมด
what are the top five of the most commonly prescribed drugs during this year?It is not neccessary to use all the tables.
 microlab:  microlabid [ number]  patientunitstayid [ number]  culturesite [ text]  organism [ text]  culturetakentime [ time] 
SELECT t1.drugname FROM (SELECT medication.drugname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM medication WHERE DATETIME(medication.drugstarttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') GROUP BY medication.drugname) AS t1 WHERE t1.c1 <= 5