ค่าแรกของโซเดียมคือเท่าใดสำหรับผู้ป่วย 23070 ตั้งแต่วันที่ 08/2103 ไม่จำเป็นต้องใช้ตารางทั้งหมด
what was the first value of sodium was for patient 23070 since 08/2103.It is not neccessary to use all the tables.
 d_icd_procedures:  row_id [ number]  icd9_code [ text]  short_title [ text]  long_title [ text] 
SELECT labevents.valuenum FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 23070) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'sodium') AND STRFTIME('%y-%m', labevents.charttime) >= '2103-08' ORDER BY labevents.charttime LIMIT 1