ได้จำนวนผู้ป่วยชายที่เกิดก่อนปี พ.ศ. 2567 ไม่จำเป็นต้องใช้ทุกตาราง
get the number of male patients who were born before the year 2024.It is not neccessary to use all the tables.
 prescriptions:  subject_id [ text]  hadm_id [ text]  icustay_id [ text]  drug_type [ text]  drug [ text]  formulary_drug_cd [ text]  route [ text]  drug_dose [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic WHERE demographic.gender = "M" AND demographic.dob_year < "2024"