บอกจำนวนครั้งที่คนไข้ 032-21820 ได้รับการตรวจ lpm o2 ในห้องปฏิบัติการในปีที่ 12/ปีนี้ ไม่จำเป็นต้องใช้ทุกตาราง
tell me the number of times that patient 032-21820 has received an lpm o2 lab test in 12/this year.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 COUNT(*) FROM lab WHERE lab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '032-21820')) AND lab.labname = 'lpm o2' AND DATETIME(lab.labresulttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') AND STRFTIME('%m', lab.labresulttime) = '12'