I have installed wordpress how can i find the database file which is used by my wordpress

Your Can find the Wordpress Database Details in the wp-config.php which is in the root directory of wordpress. 
/** MySQL database username */
define('DB_USER', '****');
/** MySQL database password */
define('DB_PASSWORD', '****');
/** MySQL hostname */
define('DB_HOST', 'localhost:/tmp/mysql.sock');
/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8');
/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');