in reply to how to create a database in perl

You control that via the dsn; see the DBD::mysql docs (second line of the synopsis):

$dsn = "DBI:mysql:database=$database;host=$hostname;port=$port";

Specifically: the 'database=$database;' part.

The part of the dsn after 'dbi:<driver>:' is given as a whole to the specific database driver; what the driver expects is specific to that driver. For example, in the case of postgresql database driver DBD::Pg, the database can be given with either 'database', 'dbname', or 'db'.

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Re^2: how to create a database in perl
by Your Mother (Archbishop) on Jan 28, 2011 at 14:41 UTC
    the database can be given with either 'database', 'dbname', or 'db'

    I think the question is "how can the database name not be given?"