[英]SQL query to calculate sum of row with previous row
This is my table这是我的桌子
date count of subscription per date
---- ----------------------------
21-03-2016 10
22-03-2016 30
23-03-2016 40
Please need your help, I need to get the result like below table, summation second row with first row, same thing for another rows:请需要您的帮助,我需要得到如下表所示的结果,将第二行与第一行相加,对另一行进行同样的处理:
date count of subscription per date
---- ----------------------------
21-03-2016 10
22-03-2016 40
23-03-2016 80
Select sum(col1) over(order by date rows between unbounded preceding and current row) cnt from mytable;
You can do a cumulative sum using the ANSI standard analytic SUM()
function:您可以使用 ANSI 标准分析SUM()
函数进行累积总和:
select date, sum(numsubs) over (order by date) as cume_numsubs
from t;
SELECT t.date, (
SELECT SUM(numsubs)
FROM mytable t2
WHERE t2.date <= t.date
) AS cnt
FROM mytable t
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