ขั้นตอนนิ่วในไตมีกี่ครั้ง - เมื่อ 6 ปีที่แล้วมีการกำจัดแคลคูลัสท่อไตออก?ไม่จำเป็นต้องใช้ตารางทั้งหมด
how many times has the kidney stone procedure - with removal of ureteral calculus been taken since 6 years ago?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 treatment WHERE treatment.treatmentname = 'kidney stone procedure - with removal of ureteral calculus' AND DATETIME(treatment.treatmenttime) >= DATETIME(CURRENT_TIME(), '-6 year')