นับจำนวนผู้ป่วย 57023 ที่เข้าหอผู้ป่วยหนักในปีนี้ ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
count how many times patient 57023 came in to intensive care unit in this year.It is not neccessary to use all the tables.
 transfers:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icustay_id [ number]  eventtype [ text]  careunit [ text]  wardid [ number]  intime [ time]  outtime [ time] 
SELECT COUNT(DISTINCT icustays.icustay_id) FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 57023) AND DATETIME(icustays.intime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year')