ตัวอย่างทดสอบใดที่ผู้ป่วย 031-22988 ได้รับเป็นครั้งแรกจนถึง 03/2104?ไม่จำเป็นต้องใช้ตารางทั้งหมด
what specimen test has patient 031-22988 received for the first time until 03/2104?It is not neccessary to use all the tables.
 vitalperiodic:  vitalperiodicid [ number]  patientunitstayid [ number]  temperature [ number]  sao2 [ number]  heartrate [ number]  respiration [ number]  systemicsystolic [ number]  systemicdiastolic [ number]  systemicmean [ number]  observationtime [ time] 
SELECT microlab.culturesite FROM microlab WHERE microlab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '031-22988')) AND STRFTIME('%y-%m', microlab.culturetakentime) <= '2104-03' ORDER BY microlab.culturetakentime LIMIT 1