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# APPROX_COUNT_DISTINCT_EACH

Approximates the number of distinct values for each given group.

APPROX_COUNT_DISTINCT([MAX_VALUES,] GROUP, VALUE)

Type:

`integer`

Default: no limit

(Optional) The maximum number of groups. Groups beyond this amount are discarded.

In some cases, discarding groups via this option may cause some data to be discarded from groups that would otherwise have been kept.

Type: any

The field by which to group the results.

Type: any

The field to count distinct values relative to each group.

Type:

`array`

Returns an array of key-value pairs where each

`GROUP`

is matched to the approximate number of distinct values `VALUE`

seen for that group.If all input values are null, zero is returned.

Last modified 1yr ago