ปีที่แล้วผู้ป่วย 018-41654 เข้าโรงพยาบาลกี่ครั้ง?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
how many times did patient 018-41654 attend the hospital in the last year?It is not neccessary to use all the tables.
 medication:  medicationid [ number]  patientunitstayid [ number]  drugname [ text]  dosage [ text]  routeadmin [ text]  drugstarttime [ time]  drugstoptime [ time] 
SELECT COUNT(DISTINCT patient.patienthealthsystemstayid) FROM patient WHERE patient.uniquepid = '018-41654' AND DATETIME(patient.hospitaladmittime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year')