apply_filters_ref_array( 'posts_groupby', string $groupby, WP_Query $query )

Filters the GROUP BY clause of the query.

Parameters

$groupby: (string) The GROUP BY clause of the query.
$query: (WP_Query) The WP_Query instance (passed by reference).

Source

File: wp-includes/class-wp-query.php

Changelog

Changelog
Version	Description
2.0.0	Introduced.