mysql> select  href, count(*), sum(bytes) from accounting group by  href order by  bytes desc limit 10;
+--------------------------------------------+----------+------------+
| href                                       | count(*) | sum(bytes) |
+--------------------------------------------+----------+------------+
| sunsdlc1-17-vhost2.mtvwca1-dc1.genuity.net |        4 |   34399839 |
| download.nvidia.com                        |        2 |   15553969 |
| ftp.mozilla.org                            |        2 |   27738788 |
| www.expressstamp.ru                        |       33 |   15660068 |
| download.ec-software.com                   |        3 |   32458017 |
| ftp.support.veritas.com                    |        1 |   13639011 |
| ftp.ecs.com.tw                             |       12 |   44241444 |
| download.gameland.ru                       |      108 |  222341319 |
| download.gigabyte.ru                       |        6 |   75456261 |
| www.e-x.ru                                 |        1 |    7706274 |
+--------------------------------------------+----------+------------+
10 rows in set (2 min 2.52 sec)