ในวันที่ 04/2104 ครั้งสุดท้ายที่ผู้ป่วย 69289 ได้รับยาแลกทูโลสและโพแทสเซียมคลอไรด์พร้อมกันคือเมื่อใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
in 04/2104, when was the last time patient 69289 was prescribed lactulose and potassium chloride at the same time?It is not neccessary to use all the tables.
 diagnoses_icd:  row_id [ number]  subject_id [ number]  hadm_id [ number]  icd9_code [ text]  charttime [ time] 
SELECT t1.startdate FROM (SELECT admissions.subject_id, prescriptions.startdate FROM prescriptions JOIN admissions ON prescriptions.hadm_id = admissions.hadm_id WHERE prescriptions.drug = 'lactulose' AND admissions.subject_id = 69289 AND STRFTIME('%y-%m', prescriptions.startdate) = '2104-04') AS t1 JOIN (SELECT admissions.subject_id, prescriptions.startdate FROM prescriptions JOIN admissions ON prescriptions.hadm_id = admissions.hadm_id WHERE prescriptions.drug = 'potassium chloride' AND admissions.subject_id = 69289 AND STRFTIME('%y-%m', prescriptions.startdate) = '2104-04') AS t2 ON t1.subject_id = t2.subject_id WHERE DATETIME(t1.startdate) = DATETIME(t2.startdate) ORDER BY t1.startdate DESC LIMIT 1