Module_Database_QueryBuilder::select_sum

查询总和

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

Database Module_Database_QueryBuilder::select_sum( 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_sum($conlumn)
{
    $this->select_adv($conlumn, 'sum');

    return $this;
}