กี่ชั่วโมงที่ผ่านมาเป็นครั้งสุดท้ายที่ผู้ป่วย 12927 สั่งให้ ns ในการเยี่ยมโรงพยาบาลครั้งนี้?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
how many hours ago was the last time patient 12927 prescribed ns in this hospital visit?It is not neccessary to use all the tables.
 admissions:  row_id [ number]  subject_id [ number]  hadm_id [ number]  admittime [ time]  dischtime [ time]  admission_type [ text]  admission_location [ text]  discharge_location [ text]  insurance [ text]  language [ text]  marital_status [ text]  ethnicity [ text]  age [ number] 
SELECT 24 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', prescriptions.startdate)) FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 12927 AND admissions.dischtime IS NULL) AND prescriptions.drug = 'ns' ORDER BY prescriptions.startdate DESC LIMIT 1