ค่าแรกของ mchc ใน 10/2103 สำหรับผู้ป่วย 70206 คืออะไร? ไม่จำเป็นต้องใช้ตารางทั้งหมด
whats the first value of mchc in 10/2103 for patient 70206?It is not neccessary to use all the tables.
 d_labitems:  row_id [ number]  itemid [ number]  label [ text] 
SELECT labevents.valuenum FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 70206) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'mchc') AND STRFTIME('%y-%m', labevents.charttime) = '2103-10' ORDER BY labevents.charttime LIMIT 1