CREATE TABLE sale(Month INT, sales INT)

LOAD DATA INFILE "moving_avg.csv"
INTO TABLE sale
FIELDS TERMINATED BY "\t"

SELECT Month,avgs(3,sales)
FROM sale
--     ASSUMING ASC Month
INTO OUTFILE "moving_avg_output.csv"
FIELDS TERMINATED BY ";"

select sales, mins(2,Month) from sale group by sales
into outfile "flatten.csv"