Module_Database_QueryBuilder::select_avg

查询平均值

$db->select_avg('test')->from('db')->group_by('class_id')->get()->as_array();

Database Module_Database_QueryBuilder::select_avg( string $conlumn )

参数列表

参数类型描述默认值

$conlumn string $conlumn

参数	类型	描述	默认值
`$conlumn`	`string`	$conlumn

File: ./modules/database/querybuilder.class.php

public function select_avg($conlumn)
{
    $this->select_adv($conlumn, 'avg');

    return $this;
}