以新闻news模块为例

全部访问总量

<?php
$ci->db->select_sum('hits');
$query = $ci->db->get(SITE_ID.'_news_hits');
$row = $query->row_array();
echo $row['hits'];
?>

今日访问总量

<?php
$ci->db->select_sum('day_hits');
$query = $ci->db->get(SITE_ID.'_news_hits');
$row = $query->row_array();
echo $row['day_hits'];
?>

本周访问总量

<?php
$ci->db->select_sum('week_hits');
$query = $ci->db->get(SITE_ID.'_news_hits');
$row = $query->row_array();
echo $row['week_hits'];
?>

以上查询不缓存，会降低网站运行效率