组行，计数分组的行和排序行的排序

Question

我想为网站制作分析系统，并且我尝试从一个数据分组，按网址分组，按行数排序加入的网址，按分组数量排序DESC行。

$sql = "SELECT COUNT(*) FROM (SELECT DISTINCT url FROM analytic) ORDER by (SELECT DISTINCT url FROM analytic)"; 
$countQry = mysqli_query($link, $sql); 

while($arr = mysqli_fetch_array($countQry)) { 
?> 
    <?=$arr['url']?> 

<? 
    } 
?> 

感谢

Answer 1

尝试使用GROUP BY：

SELECT url, COUNT(url) AS theCount 
FROM analytic 
GROUP BY url 
ORDER BY theCount DESC 

这里是PHP代码供您使用：

$sql = "SELECT url, COUNT(url) AS theCount FROM analytic GROUP BY url ORDER BY by theCount DESC"; 
$countQry = mysqli_query($link, $sql); 
while ($row = mysqli_fetch_array($countQry, MYSQLI_ASSOC)) { 
    echo $row['url'], ", ", $row['theCount']; 
}