我通过对引用者进行分组来获取数据,并且在每个引用者中,我尝试获得每个引用者的平均点击次数。例如:
referer a site
--------------
avg clicks: 12
referer b site
--------------
avg clicks: 4
我使用此代码
SELECT *, COUNT(*)
FROM track
GROUP BY referer
ORDER BY id desc
LIMIT 15
while ($yazdir=mysql_fetch_array($sqlsorgu))
{
$count = $yazdir['COUNT(*)'];
$clicks[] = $yazdir[clicks];
$score_sum = array_sum($clicks);
$mean_average = $score_sum / $count;
}
然而,它总是计算错误的数字,也许它也存储以前的数字。获得每个参考者的平均点击次数的正确方法是什么?
答案 0 :(得分:3)
为什么不
SELECT *, COUNT(*),AVG(clicks)
FROM track GROUP BY referer ORDER BY id desc limit 15