มีผู้ป่วยกี่รายที่ได้รับเครื่องปั๊มแช่หลังป้อนสารอาหารเข้าในช่องปากจนถึงปี 2103 ในการเยี่ยมโรงพยาบาลครั้งเดียวกัน?ไม่จำเป็นต้องใช้ตารางทั้งหมด
how many patients received insert infusion pump after entral infus nutrit sub until 2103 in the same hospital visit?It is not neccessary to use all the tables.
 labevents:  row_id [ number]  subject_id [ number]  hadm_id [ number]  itemid [ number]  charttime [ time]  valuenum [ number]  valueuom [ text] 
SELECT COUNT(DISTINCT t1.subject_id) FROM (SELECT admissions.subject_id, procedures_icd.charttime, admissions.hadm_id FROM procedures_icd JOIN admissions ON procedures_icd.hadm_id = admissions.hadm_id WHERE procedures_icd.icd9_code = (SELECT d_icd_procedures.icd9_code FROM d_icd_procedures WHERE d_icd_procedures.short_title = 'entral infus nutrit sub') AND STRFTIME('%y', procedures_icd.charttime) <= '2103') AS t1 JOIN (SELECT admissions.subject_id, procedures_icd.charttime, admissions.hadm_id FROM procedures_icd JOIN admissions ON procedures_icd.hadm_id = admissions.hadm_id WHERE procedures_icd.icd9_code = (SELECT d_icd_procedures.icd9_code FROM d_icd_procedures WHERE d_icd_procedures.short_title = 'insert infusion pump') AND STRFTIME('%y', procedures_icd.charttime) <= '2103') AS t2 ON t1.subject_id = t2.subject_id WHERE t1.charttime < t2.charttime AND t1.hadm_id = t2.hadm_id