ในปีนี้ มีผู้ป่วยกี่รายที่ได้รับยาโพแทสเซียมคลอไรด์ในเดือนเดียวกันหลังจากที่พวกเขามียาแก้ปวด - ยาแก้ปวดยาเสพติด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
this year, how many patients were prescribed potassium chloride in the same month after they had a analgesics - narcotic analgesic?It is not neccessary to use all the tables.
 lab:  labid [ number]  patientunitstayid [ number]  labname [ text]  labresult [ number]  labresulttime [ time] 
SELECT COUNT(DISTINCT t1.uniquepid) FROM (SELECT patient.uniquepid, treatment.treatmenttime FROM treatment JOIN patient ON treatment.patientunitstayid = patient.patientunitstayid WHERE treatment.treatmentname = 'analgesics - narcotic analgesic' AND DATETIME(treatment.treatmenttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year')) AS t1 JOIN (SELECT patient.uniquepid, medication.drugstarttime FROM medication JOIN patient ON medication.patientunitstayid = patient.patientunitstayid WHERE medication.drugname = 'potassium chloride' AND DATETIME(medication.drugstarttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year')) AS t2 WHERE t1.treatmenttime < t2.drugstarttime AND DATETIME(t1.treatmenttime, 'start of month') = DATETIME(t2.drugstarttime, 'start of month')