ode example $3-1$

SELECT vendorName, invoiceNumber, invoiceDate, invoiceTotal

FROM vendors INNER JOIN invoices

ON vendors.vendorID $=$ invoices.vendorID

WHERE invoiceTotal $>=500$

ORDER BY vendorName DESC

$($Refer to code example $3-1.)$ If vendorName contains string data and invoiceTotal contains decimal values, how will the result set be ordered?