[root@ns1 pdns]# yum search mysql-server
Loading "installonlyn" plugin
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Reading repository metadata in from local files
Excluding Packages from CentOS-5 - Base
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mysql.i386                               5.0.22-2.1.0.1         installed
Matched from:
mysql
MySQL client programs and shared libraries.

MySQL is a multi-user, multi-threaded SQL database server. MySQL is a
client/server implementation consisting of a server daemon (mysqld)
and many different client programs and libraries. The base package
contains the MySQL client programs, the client shared libraries, and
generic MySQL files.