ผ่านไปกี่ชั่วโมงแล้วนับตั้งแต่ที่คนไข้ 28447 เข้าห้องไอซียู?ไม่จำเป็นต้องใช้โต๊ะทั้งหมดเลย
how many hours have passed since the the time patient 28447 was admitted to the icu?It is not neccessary to use all the tables.
 procedures_icd:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icd9_code [ text]  charttime [ time] 
SELECT 24 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', icustays.intime)) FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 28447) AND icustays.outtime IS NULL