I tried this to save:

use strict;
use warnings;
use Tk;
use Tk::JPEG;
use DBI;

my $datenbank = "bilder";
my $db_host = "localhost";
my $db_port = "3306";

my $db_user = "root";
my $db_pw = "12345";

my $dbh;

my $dsn  = "DBI:mysql:database=$datenbank;host=$db_host;port=$db_port"
+;

eval {
                $dbh = DBI::->connect( $dsn, $db_user, $db_pw, { Raise
+Error => 1, PrintError => 0, AutoCommit => 1 } );
         };
         
if ($@)  
        {
        print DBI::errstr;
        }

my $mw = MainWindow->new();
        
my $bild = $mw->Photo( -file => "test.jpg" );

$dbh->do("INSERT INTO User (User,Bild) values (?,?)", undef, "2", $bil
+d);

my $label = $mw->Label(-image => $bild, -background => '#ffffff')->pac
+k();                                                      

MainLoop;
[download]

And this to read:

use strict;
use warnings;
use Tk;
use Tk::JPEG;
use DBI;

my $datenbank = "bilder";
my $db_host = "localhost";
my $db_port = "3306";

my $db_user = "root";
my $db_pw = "12345";

my $dbh;

my $dsn  = "DBI:mysql:database=$datenbank;host=$db_host;port=$db_port"
+;

$dbh = DBI::->connect( $dsn, $db_user, $db_pw, { RaiseError => 1, Prin
+tError => 0, AutoCommit => 1 } );

my $mw = MainWindow->new();
    
my $sql = "SELECT Bild FROM User WHERE User = 2;";
my $sth = $dbh->prepare($sql);
$sth->execute;

my $bildausdb;
($bildausdb) = $sth->fetchrow_array;

my $bild = $mw->Photo( -data => $bildausdb );

my $label = $mw->Label(-image => $bild, -background => '#ffffff')->pac
+k();        

MainLoop;
[download]