[英]MYSQL PHP API - Displaying & Fetching multiple rows within rows from another table
[英]Fetching multiple rows from mysql table and depicting time bounds using PHP
我有如下所示的mysql表
ip_add mac time
10.0.0.97 00 14 2A 2F 72 FE 2013-09-18 16:35:47
10.0.0.97 00 14 2A 2F 72 FE 2013-09-19 08:48:02
10.0.0.98 08 CC 68 71 A1 C0 2013-09-18 16:35:47
10.0.0.98 08 CC 68 71 A1 C0 2013-09-19 08:48:02
我有一个PHP脚本,我想打印以下几行
The ip address 10.0.0.97 was used by MAC 00 14 2A 2F 72 FE from 2013-09-18 16:35:47 to 2013-09-19 08:48:02
The ip address 10.0.0.97 was used by MAC 00 14 2A 2F 72 FE from 2013-09-19 08:48:02 to present(i.e there has not been a further entry of that ip )
The ip address 10.0.0.98 was used by MAC 00 14 2A 2F 72 FE from 2013-09-18 16:35:47 to 2013-09-19 08:48:02
The ip address 10.0.0.97 was used by MAC 00 14 2A 2F 72 FE from 2013-09-19 08:48:02 to present
我已将脚本编写如下
$var = $_POST['IP'](ip which will be obtained from form);
mysql_connect('localhost','root','mysql');
mysql_select_db('logs');
$result=mysql_query("select ip_add,mac from arp_table where ip_add='$var'");
$row=mysql_fetch_row($result);
$count=mysql_query("select COUNT (*) from arp_table where ip_add='$var'");
$row2 =mysql_fetch_row($count);
echo "The number of instances this ip address was used is {$row2[0]}<br/>"
if($row2==1){
$time=mysql_query("select ip_add, time from arp_table where ip_add='$var'")
$time2=mysql_fetch_row($time);
echo "It was used from {$time2[1]} and it is still in use<br/>";}
else
{$time3=mysql_query("select ip_add,time from arp_table where ip_add='$var'");
while($row3=mysql_fetch_assoc($time3)){
echo "This ip was used by MAC {$row[1]} from (*I`M STUCK HERE*) to (*I`M STUCK HERE*)"}
}
我如何获取它以获取同一IP注册的上一个时间并将其关联到下一个在线时间
尝试这个:
SELECT
ip_add,
mac,
MIN(time) as from_time,
MAX(time) as to_time
FROM
my_table
GROUP BY
ip_add,
mac
或者,如果您想要每一行:
SELECT
a.ip_add,
a.mac,
a.time as from_time,
(
SELECT
time
FROM
my_table b
WHERE
b.ip_add = a.ip_add
AND a.time < b.time
ORDER BY
b.time
LIMIT 1
) as to_time
FROM
my_table a
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.