MAX() GROUP BY ...

All functions > GROUP BY > MAX() GROUP BY ...

Returns the maximum value in the group.

Syntax

MAX(expr)
 [ FILTER (WHERE condition) ]
  [ GROUP BY feature [, feature ...] ]

MAX(expr)
 [ FILTER (WHERE condition) ]
  [ GROUP BY feature [, feature ...] ]

Notes

• Returns the largest value in the group
• Works with numeric, string, and date types
• NULL values are excluded from the calculation
• Returns NULL if all values are NULL or group is empty
• With num_values parameter, returns an array of the N largest values
• Can be used with WHERE clause to filter before aggregation
• Can be used with GROUP BY clause for grouped aggregation

Examples

SELECT
    f1 := ZIP(ARRAY[1, 5, 3] AS value).TRANSFORM(SELECT MAX(value)).UNWRAP_ONE() -- Maximum in one group
;