นับจำนวนผู้ป่วยที่ได้รับครีม triamcinolone acetonide 0.1% ไม่จำเป็นต้องใช้ทุกตาราง
count the number of patients who have been prescribed triamcinolone acetonide 0.1% cream.It is not neccessary to use all the tables.
 outputevents:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icustay_id [ number]  charttime [ time]  itemid [ number]  value [ number] 
SELECT COUNT(DISTINCT admissions.subject_id) FROM admissions WHERE admissions.hadm_id IN (SELECT prescriptions.hadm_id FROM prescriptions WHERE prescriptions.drug = 'triamcinolone acetonide 0.1% cream')