ตั้งแต่ปี 2103 ยาอะไรที่พบบ่อยที่สุดสามอันดับแรกที่จ่ายให้กับผู้ป่วยภายใน 2 เดือนหลังจากสั่งยาโซเดียมคลอไรด์ 0.9% 250 มล. pb?ไม่จำเป็นต้องใช้ตารางทั้งหมด
since 2103, what are the top three most frequent drugs prescribed to patients within 2 months after the prescription of sodium chloride 0.9% 250 ml pb?It is not neccessary to use all the tables.
 medication:  medicationid [ number]  patientunitstayid [ number]  drugname [ text]  dosage [ text]  routeadmin [ text]  drugstarttime [ time]  drugstoptime [ time] 
SELECT t3.drugname FROM (SELECT t2.drugname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM (SELECT patient.uniquepid, medication.drugstarttime FROM medication JOIN patient ON medication.patientunitstayid = patient.patientunitstayid WHERE medication.drugname = 'sodium chloride 0.9% 250 ml pb' AND STRFTIME('%y', medication.drugstarttime) >= '2103') AS t1 JOIN (SELECT patient.uniquepid, medication.drugname, medication.drugstarttime FROM medication JOIN patient ON medication.patientunitstayid = patient.patientunitstayid WHERE STRFTIME('%y', medication.drugstarttime) >= '2103') AS t2 ON t1.uniquepid = t2.uniquepid WHERE t1.drugstarttime < t2.drugstarttime AND DATETIME(t2.drugstarttime) BETWEEN DATETIME(t1.drugstarttime) AND DATETIME(t1.drugstarttime, '+2 month') GROUP BY t2.drugname) AS t3 WHERE t3.c1 <= 3