Between 1/1/2012 to 12/31/2014, which date recorded the hottest temperature in weather station 1?
weather station 1 refers to station_nbr = 1; hottest temperature refers to Max(tmax); between 1/1/2012 to 12/31/2014 refers to SUBSTR(date, 1, 4) between 2012 and 2014
SELECT `date` FROM weather WHERE station_nbr = 1 AND CAST(SUBSTR(`date`, 1, 4) AS int) BETWEEN 2012 AND 2014 ORDER BY tmax DESC LIMIT 1