For the weather station has store no.9, what was the increased percentage of the average temperature from 2012/2/2 to 2012/2/3?
store no.9 refers to store_nbr = 9; 2012/2/2 refers to date = '2012-02-02'; 2012/2/3 refers to date = '2012-02-03'; average temperature refers to tavg; increase percentage = Divide (Subtract (tavg where date = '2012-02-03', tavg where date = '2012-02-02'), tavg where date = '2012-02-02') * 100
SELECT CAST((SUM(CASE WHEN T1.`date` = '2012-02-03' THEN T1.tavg * 1 ELSE 0 END) - SUM(CASE WHEN T1.`date` = '2012-02-02' THEN T1.tavg * 1 ELSE 0 END)) AS REAL) * 100 / SUM(CASE WHEN T1.`date` = '2012-02-02' THEN T1.tavg * 1 ELSE 0 END) FROM weather AS T1 INNER JOIN relation AS T2 ON T1.station_nbr = T2.station_nbr WHERE T2.store_nbr = 9