AVG() OVER ...

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

Returns the average of values in the window frame.

Syntax

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

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

Notes

• Calculates average over a window of rows
• Useful for moving averages and rolling means
• 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 AVG(v) OVER (ORDER BY id ASC)).UNWRAP() -- Running average (v permuted so means differ from v)
;