[英]count and fetch each number individually and count how many times each number appears in a database
这是我遇到的问题。
我的表格的MSISDN列中有一个数字,我想分别计算每个数字并计算每个数字出现多少次,然后在表格中将特定数字及其出现的时间显示在表格中,例如
Number(MSISDN) | No of times
这是我的代码,我备货充足,因为我不知道该采取什么步骤或如何从自己所在的位置移动。
$go=mysql_query("SELECT * FROM request_from");
$go2=mysql_fetch_array($go);
$i=0;
while($go2=mysql_fetch_array($go))
{
$i++;
$tel=$go2['msisdn'];
//counting number of time each number occurs
$xtt=mysql_query("SELECT * FROM request_from WHERE msisdn='$tel'");
$xtt2=mysql_fetch_array($xtt);
$g=1;
while($xtt2=mysql_fetch_array($xtt))
{
$g++;
}
echo $tel occurs $g times; //for all the phone numbers, it displays the number of time each number occurs
做这个:
SELECT msisdn ,sum(1) anz FROM request_from
GROUP BY msisdn;
在sql中执行此操作要简单得多:
SELECT msisdn, COUNT(*) AS number_of_occurrances FROM request_from GROUP BY msisdn;
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