Content in WordPress is inside the WordPress database.
If you have deleted the WP database, then the content is gone. Installing a new WP instance will create a new, mostly blank database.
So, unless you have a backup copy of your database to restore, your content is gone.
Your hosting place may have made a backup of things, including your database. So you might contact them to see if they can restore your databases.
Unless the hosting place has a backup copy (many do), you might be out of luck. Sorry.
(For 'lurkers' ... do you have a backed up / offsite copy of your WordPress database? There are many plugins that will do that for you.)