SUM() OVER ...

All functions > WINDOW FUNCTION > SUM() OVER ...

Returns the sum of values in the window frame.

Syntax

SUM(expr) OVER ([PARTITION BY expr [, ...]] [ORDER BY sort_item [, ...]] [ROWS|RANGE|GROUPS frame])

SUM(expr) OVER ([PARTITION BY expr [, ...]] [ORDER BY sort_item [, ...]] [ROWS|RANGE|GROUPS frame])

Notes

• Calculates sum over a window of rows
• Useful for running totals and cumulative sums
• Returns same type as input expression
• NULL values are ignored in the calculation

See also

• OVER clause

Examples

SELECT
    f1 := ZIP(ARRAY[1,2,3] AS id, ARRAY[30,10,20] AS v).TRANSFORM(SELECT SUM(v) OVER (ORDER BY id ASC)).UNWRAP() -- Running sum (default frame to current row; v permuted so totals differ from v)
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