If you have a copy of your original ‘wp-config.php’ file, you can look for these lines:
/** The name of the database for WordPress */
define(‘DB_NAME’, ‘my_uname_mywpdb01’);
/** MySQL database username */
define(‘DB_USER’, ‘my_uname_mydbase01’);
The DB_NAME is the name of your original database that holds the posts you are looking for. The data (posts) and all other content should still be in that database.