// Function to obtain data and populate in DataGridView
        private void displayCustomers()
        {
            DataInterface.DBOpen();
            // Query to select desired information to display
            String query = "SELECT c.customerId AS ID, c.customerName AS Name, c.active AS Active, a.address AS Address, a.address2 AS Address2, a.city AS City, a.postalCode AS 'Postal Code', a.country AS Country, a.phone AS Phone " +
                           "FROM customer AS c, (SELECT address.addressId, address.address, address.address2, address.postalCode, address.phone, city.city, country.country FROM address, city, country WHERE address.cityId = city.cityId AND city.countryId = country.countryId) AS a " +
                           "WHERE c.addressId = a.addressId";

            // Pass query and desired DGV to function to obtain data and populate
            DataInterface.displayDGV(query, customersDGV);
        }