Calculating running totals and moving averages

Time Series Analysis in SQL Server

Maham Faisal Khan

Senior Data Science Content Developer

Calculating running totals

Team	Game	RunsScored
AZ	1	8
AZ	2	6
AZ	3	3
FLA	1	7
FLA	2	7
FLA	3	6

Team	Game	RunsScored	TotalRuns
AZ	1	8	8
AZ	2	6	14
AZ	3	3	17
FLA	1	7	7
FLA	2	7	14
FLA	3	6	20

Running totals

SELECT
    s.Team,
    s.Game,
    s.RunsScored,
    SUM(s.RunsScored) OVER (
        PARTITION BY s.Team
        ORDER BY s.Game ASC
        RANGE BETWEEN
              UNBOUNDED PRECEDING
              AND CURRENT ROW
    ) AS TotalRuns
FROM #Scores s;

Team, Game, RunsScored columns
SUM(s.RunsScored)
OVER()
PARTITION BY s.Team
ORDER BY s.Game ASC
RANGE BETWEEN
UNBOUNDED PRECEDING
AND CURRENT ROW

RANGE and ROWS

`RANGE`

Specify a range of results
"Duplicates" processed all at once
Only supports UNBOUNDED and CURRENT ROW

`ROWS`

Specify number of rows to include
"Duplicates" processed a row at a time
Supports UNBOUNDED, CURRENT ROW, and number of rows

Calculating moving averages

SELECT
    s.Team,
    s.Game,
    s.RunsScored,
    AVG(s.RunsScored) OVER (
        PARTITION BY s.Team
        ORDER BY s.Game ASC
        ROWS BETWEEN 1 PRECEDING
            AND CURRENT ROW
    ) AS AvgRuns
FROM #Scores s;

Team	Game	RunsScored	AvgRuns
AZ	1	8	8
AZ	2	6	7
AZ	3	3	4
FLA	1	7	7
FLA	2	7	7
FLA	3	6	6

Let's practice!

Time Series Analysis in SQL Server