CollectionFind::groupBy

Set grouping criteria

Description

public mysql_xdevapi\CollectionFind mysql_xdevapi\CollectionFind::groupBy(string $sort_expr)

This function can be used to group the result set by one or more columns. It is often used with aggregate functions such as COUNT, MAX, MIN, SUM etc.

Parameters

sort_expr: The column or columns that have to be used for the group operation, this can either be a single string or an array of string arguments, one for each column.

Return Values

A CollectionFind object that can be used for further processing.

Examples

Example #1 mysql_xdevapi\CollectionFind::groupBy example

<?php

// Assuming $coll is a valid Collection object

// Extract all the documents from the Collection and group the results by the 'name' field
$res = $coll->find()->groupBy('name')->execute();

?>