select 
date_format(SALES_DATE ,'%Y-%m') as month from users group by YEAR_MONTH;
sum(YEAR_MONTH) over(order by YEAR_MONTH 
rows between 11 preceding and current row
) as 売上累計,
sum(YEAR_MONTH) over(order by YEAR_MONTH 
rows between 11 preceding and current row
) as 移動年計
from SALES
group by YEAR_MONTH