The Ultimate Guide to High Availability with MariaDB

Comments - Window Frames

7 years, 9 months ago Rick James
Re: Window Frames

After a lot of guessing, I see that MariaDB supports things like these:

SELECT
       AVG(x) OVER(ORDER BY date RANGE BETWEEN 4 PRECEDING AND CURRENT ROW)  AS MovingAvg,
       SUM(x) OVER(ORDER BY date RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS CumulativeTotal
FROM t;

That assumes that `x` is some numeric thing you are interested in, and the table needs to be sorted by `date` for computing a "Moving Average" and a "Cumulative Total".

 
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