สำหรับผู้ป่วยที่สั่งจ่ายยาลิเธียมคาร์บอเนต sr (ลิโทบิด) ยา 4 ชนิดที่สั่งบ่อยที่สุดในเวลาเดียวกันจนถึง 1 ปีที่แล้วคือยาอะไร ไม่จำเป็นต้องใช้ทุกตาราง
for patients that were prescribed with lithium carbonate sr (lithobid), what are the four most commonly ordered drugs at the same time, until 1 year ago?It is not neccessary to use all the tables.
 patients:  row_id [ number]  subject_id [ number]  gender [ text]  dob [ time]  dod [ time] 
SELECT t3.drug FROM (SELECT t2.drug, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM (SELECT admissions.subject_id, prescriptions.startdate FROM prescriptions JOIN admissions ON prescriptions.hadm_id = admissions.hadm_id WHERE prescriptions.drug = 'lithium carbonate sr (lithobid)' AND DATETIME(prescriptions.startdate) <= DATETIME(CURRENT_TIME(), '-1 year')) AS t1 JOIN (SELECT admissions.subject_id, prescriptions.drug, prescriptions.startdate FROM prescriptions JOIN admissions ON prescriptions.hadm_id = admissions.hadm_id WHERE DATETIME(prescriptions.startdate) <= DATETIME(CURRENT_TIME(), '-1 year')) AS t2 ON t1.subject_id = t2.subject_id WHERE DATETIME(t1.startdate) = DATETIME(t2.startdate) GROUP BY t2.drug) AS t3 WHERE t3.c1 <= 4