ขั้นตอนทั่วไปสี่ขั้นตอนสำหรับผู้ป่วยอายุ 40 ปีตั้งแต่ปี 2100 คืออะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
what are the four common procedures for patients 40s since 2100?It is not neccessary to use all the tables.
 admissions:  row_id [ number]  subject_id [ number]  hadm_id [ number]  admittime [ time]  dischtime [ time]  admission_type [ text]  admission_location [ text]  discharge_location [ text]  insurance [ text]  language [ text]  marital_status [ text]  ethnicity [ text]  age [ number] 
SELECT d_icd_procedures.short_title FROM d_icd_procedures WHERE d_icd_procedures.icd9_code IN (SELECT t1.icd9_code FROM (SELECT procedures_icd.icd9_code, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM procedures_icd WHERE procedures_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.age BETWEEN 40 AND 49) AND STRFTIME('%y', procedures_icd.charttime) >= '2100' GROUP BY procedures_icd.icd9_code) AS t1 WHERE t1.c1 <= 4)