ครั้งแรกที่ผู้ป่วย 002-13750 ได้รับการสั่งยาในปี 04/ปีนี้?ไม่จำเป็นต้องใช้ทุกตาราง
when is the first time patient 002-13750 was prescribed a drug in 04/this year?It is not neccessary to use all the tables.
 cost:  costid [ number]  uniquepid [ text]  patienthealthsystemstayid [ number]  eventtype [ text]  eventid [ number]  chargetime [ time]  cost [ number] 
SELECT medication.drugstarttime FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '002-13750')) AND DATETIME(medication.drugstarttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') AND STRFTIME('%m', medication.drugstarttime) = '04' ORDER BY medication.drugstarttime LIMIT 1