นับจำนวนคนไข้ที่มีตำแหน่งรับเข้า trsf ภายในสถานที่นี้และปีเกิดน้อยกว่า 2,150 หรือไม่ ไม่จำเป็นต้องใช้ตารางทั้งหมด
count the number of patients whose admission location is trsf within this facility and year of birth is less than 2150?It is not neccessary to use all the tables.
 demographic:  subject_id [ text]  hadm_id [ text]  name [ text]  marital_status [ text]  age [ text]  dob [ text]  gender [ text]  language [ text]  religion [ text]  admission_type [ text]  days_stay [ text]  insurance [ text]  ethnicity [ text]  expire_flag [ text]  admission_location [ text]  discharge_location [ text]  diagnosis [ text]  dod [ text]  dob_year [ text]  dod_year [ text]  admittime [ text]  dischtime [ text]  admityear [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic WHERE demographic.admission_location = "TRSF WITHIN THIS FACILITY" AND demographic.dob_year < "2150"