ในเดือนนี้ให้ยาเมโทโคลพราไมด์กี่ครั้งสำหรับผู้ป่วย 42829?ไม่จำเป็นต้องใช้ตารางทั้งหมด
how many times was the metoclopramide prescribed in this month for patient 42829?It is not neccessary to use all the tables.
 cost:  row_id [ number]  subject_id [ number]  hadm_id [ number]  event_type [ text]  event_id [ number]  chargetime [ time]  cost [ number] 
SELECT COUNT(*) FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 42829) AND prescriptions.drug = 'metoclopramide' AND DATETIME(prescriptions.startdate, 'start of month') = DATETIME(CURRENT_TIME(), 'start of month', '-0 month')