การเปลี่ยนแปลงของน้ำหนักของผู้ป่วย 739 ที่วัดได้ที่ 2105-12-31 163000 เป็นเท่าใด เมื่อเทียบกับค่าที่วัดที่ 2105-12-30 040000 ไม่จำเป็นต้องใช้ตารางทั้งหมด
how much is the change in weight of patient 739 measured at 2105-12-31 163000 compared to the value measured at 2105-12-30 040000?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 (SELECT chartevents.valuenum FROM chartevents WHERE chartevents.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 739)) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'admit wt' AND d_items.linksto = 'chartevents') AND chartevents.charttime = '2105-12-31 16:30:00') - (SELECT chartevents.valuenum FROM chartevents WHERE chartevents.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 739)) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'admit wt' AND d_items.linksto = 'chartevents') AND chartevents.charttime = '2105-12-30 04:00:00')