ค่าบิลิรูบินโดยตรงขั้นต่ำของผู้ป่วย 74392 คือเท่าไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
what's patient 74392's minimum value of bilirubin, direct?It is not neccessary to use all the tables.
 patients:  row_id [ number]  subject_id [ number]  gender [ text]  dob [ time]  dod [ time] 
SELECT MIN(labevents.valuenum) FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 74392) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'bilirubin, direct')