CREATE FUNCTION fnDateRange $($ @DateMin varchar$(50)=$ NULL, @DateMax varchar$(50)=$ NULL$)$

RETURNS TABLE

As

RETURN

$($

SELECT InvoiceNumber, InvoiceDate, InvoiceTotal, InvoiceTotal $-$ CreditTotal $-$ PaymentTotal AS Balance

FROM Invoices WHERE InvoiceDate BETWEEN @DateMin AND @DateMax

$)$;

GO Invoke this funtion from within a SELECT statement to return those invoices with InvoiceDate between October $10$ and October $20,2019.$