นับจำนวนผู้ป่วยที่ได้รับการวินิจฉัยว่าหายใจล้มเหลวเฉียบพลัน จนถึงปี 2103 และไม่ได้กลับมาที่โรงพยาบาลภายใน 2 เดือน ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
count the number of patients who were diagnosed with acute respiratory failure until 2103 and did not return to the hospital within 2 months.It is not neccessary to use all the tables.
 intakeoutput:  intakeoutputid [ number]  patientunitstayid [ number]  cellpath [ text]  celllabel [ text]  cellvaluenumeric [ number]  intakeoutputtime [ time] 
SELECT (SELECT COUNT(DISTINCT t1.uniquepid) FROM (SELECT patient.uniquepid, diagnosis.diagnosistime FROM diagnosis JOIN patient ON diagnosis.patientunitstayid = patient.patientunitstayid WHERE diagnosis.diagnosisname = 'acute respiratory failure' AND STRFTIME('%y', diagnosis.diagnosistime) <= '2103') AS t1) - (SELECT COUNT(DISTINCT t2.uniquepid) FROM (SELECT patient.uniquepid, diagnosis.diagnosistime FROM diagnosis JOIN patient ON diagnosis.patientunitstayid = patient.patientunitstayid WHERE diagnosis.diagnosisname = 'acute respiratory failure' AND STRFTIME('%y', diagnosis.diagnosistime) <= '2103') AS t2 JOIN patient ON t2.uniquepid = patient.uniquepid WHERE t2.diagnosistime < patient.hospitaladmittime AND STRFTIME('%y', patient.hospitaladmittime) <= '2103' AND DATETIME(patient.hospitaladmittime) BETWEEN DATETIME(t2.diagnosistime) AND DATETIME(t2.diagnosistime, '+2 month'))