How to put/see back my old archief

Now my site is back

Back from where? After what?

@esmi : From not good upgrade new version 3.5.1. and from Error establishing a database connection.

Do you have a pre-upgrade database backup?

@emse : I don’t understand about pre-upgrade database backup!

but I see my old artikels on database/mysql

Are you sure that you are connecting to the correct database in your wp-config.php file?

@esme : I think so! Cos I can see my site again wihtout my all artikels

Do you know how to make back-up with XML then I can importeren

No – you need to actually check the wp-config.php file.

@esmee : We have checked the wp-config.php already if not i can see only Error establishing a database connection in my site.

i made back-up only in mysql so not with XML file

No – by the looks of your site, you tried to re-install WordPress using another database. Having said that, the site is completely broken with absolutely no CSS or theme.

@esme : wij use new config.php WP 3.5.1. and so we have new name database username etc.

I made back-up in mysql before i upgrade WP 3.5.1 then I upgrade I see only blank screen when I inlog. Then wij delete the database and I see Error establishing a database connection then i mail the hosting to put back the database and also back-up when i made before upgrade WP 3.5.1.

Then wij got new username database etc.