ให้ฉันสี่อันดับแรกของเหตุการณ์เอาต์พุตที่พบบ่อยที่สุดหรือไม่ ไม่จำเป็นต้องใช้ตารางทั้งหมด
give me the top four of the most common output events?It is not neccessary to use all the tables.
 icustays:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icustay_id [ number]  first_careunit [ text]  last_careunit [ text]  first_wardid [ number]  last_wardid [ number]  intime [ time]  outtime [ time] 
SELECT d_items.label FROM d_items WHERE d_items.itemid IN (SELECT t1.itemid FROM (SELECT outputevents.itemid, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM outputevents GROUP BY outputevents.itemid) AS t1 WHERE t1.c1 <= 4)