看看我mysql的版本

/usr/bin/mysqladmin  Ver 8.23 Distrib 3.23.54, for redhat-linux-gnu on i386
Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license

Server version          3.23.54
Protocol version        10
Connection              Localhost via UNIX socket
UNIX socket             /var/lib/mysql/mysql.sock
Uptime:                 2 days 15 hours 34 min 17 sec

Threads: 20  Questions: 752940  Slow queries: 0  Opens: 56396  Flush tables: 1  Open tables: 64 Queries per second avg: 3.290


我的版本是不是好老啊？
可以升级的吗？
升级的话以前的数据会出问题吗？