How to calculated multiple moving average in MySQL

Question

Using table below, How would get a column for 5 period moving average, 10 period moving average, 5 period exponential moving average.

+--------+------------         


        

Answer 1

SELECT   t1.data_date, 
( SELECT  SUM(t2.price) / COUNT(t2.price) as MA5 FROM mytable AS t2    WHERE DATEDIFF(t1.data_date, t2.data_date) BETWEEN 0 AND 6 ) 
FROM mytable AS t1   ORDER BY t1.data_date;

Change 6 to 13 for 10-day MA