บอกฉันว่ายาที่จ่ายให้กับผู้ป่วย 6580 เป็นครั้งสุดท้ายผ่านเส้นทาง po ตั้งแต่ 04/2105 ไม่จำเป็นต้องใช้ทุกตาราง
tell me the drug that was prescribed to patient 6580 for the last time through the po route since 04/2105?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 prescriptions.drug FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 6580) AND prescriptions.route = 'po' AND STRFTIME('%y-%m', prescriptions.startdate) >= '2105-04' ORDER BY prescriptions.startdate DESC LIMIT 1