ครั้งสุดท้ายที่ผู้ป่วย 12938 ได้รับใบสั่งยาในปี 02/ปีที่แล้วคือเมื่อใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
when was the last time patient 12938 received prescriptions in 02/last year?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.startdate FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 12938) AND DATETIME(prescriptions.startdate, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year') AND STRFTIME('%m', prescriptions.startdate) = '02' ORDER BY prescriptions.startdate DESC LIMIT 1