Having databases without passwords is a bad idea, but if you really must do it the following code works for me. 

my $database = 'test';
my $dbh = DBI->connect("DBI:mysql:$database",undef,undef,{ RaiseError 
+=> 1 });

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In reply to Re: Using DB->connect for mysql db without password by rnewsham
in thread Using DB->connect for mysql db without password by angeloulivieri

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