eg:. Statistics 1-- cumulative sales in December, January is the value that is in January, February and December values in March and 123 in February, in December 1--12 month values and
SELECT
month,SUM(amount) month_amount,
SUM( SUM(amount)) OVER (ORDER BY month ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS cumulative_amount FROM table_name GROUP BY month ORDER BY month; Wherein: the interior of SUM (SUM (amount)) SUM (amount) accumulated value required in the above can be replaced month_amount ORDER BY month by month query read recorded sort is the sort within the window
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW define the start and end points, UNBOUNDED PRECEDING as a starting point, indicating that starting from the first row, CURRENT ROW is the default value, which is an equivalent to:
ROWS UNBOUNDED PRECEDING
PRECEDING: N means the front row.
FOLLOWING: means after N lines.
And between 3 months before computing
SUM( SUM(amount)) OVER (ORDER BY month ROWS BETWEEN 3 PRECEDING AND CURRENT ROW) AS cumulative_amount
or
SUM( SUM(amount)) OVER (ORDER BY month 3 PRECENDING) AS cumulative_amount
And between the front month
SUM( SUM(amount)) OVER (ORDER BY month ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) AS cumulative_amount
Statistics from 7.23 to 7.26 cumulative and achieve results:
2018-07-23 10527150773 10527150773
2018-07-24 11799445150 22326595923
2018-07-25 11238537810 33565133733
2018-07-26 10917352755 44482486488
select datemion,sum(loan_amount),sum(sum(loan_amount)) OVER (ORDER BY datemion ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) from( select datemion,strdeptcode,loan_amount,b.busiarea_code from a inner b on a.strdeptcode = b.dept_code where a.datemion between '2018-07-23' and '2018-07-26') a group by datemion If you follow within a month to accumulate, add partition field to indicate partitioned by month accumulated sum within a month, from the 1st to the end of the month:
select datemion,sum(loan_amount),sum(sum(loan_amount)) OVER (distribute by date_format(datemion,'yyyy-MM') sort BY datemion ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) from( select datemion,strdeptcode,loan_amount,b.busiarea_code from app.app_total_busioverview_aggre a inner join dim.dim_department_v b on a.strdeptcode = b.dept_code where a.datemion between '2018-07-23' and '2018-09-26') a group by datemion order by datemion;