ผู้ป่วย 9964 ในปี 2105 อยู่ในโรงพยาบาลกี่ครั้ง?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
how many times was patient 9964 in 2105 in the hospital?It is not neccessary to use all the tables.
 prescriptions:  row_id [ number]  subject_id [ number]  hadm_id [ number]  startdate [ time]  enddate [ time]  drug [ text]  dose_val_rx [ text]  dose_unit_rx [ text]  route [ text] 
SELECT COUNT(DISTINCT admissions.hadm_id) FROM admissions WHERE admissions.subject_id = 9964 AND STRFTIME('%y', admissions.admittime) = '2105'