How to select rows where multiple joined table values meet selection criteria?

Question

Given the following sample table schema

Customer Table

CustID
1
2
3

Invoice Table

CustID InvoiceID

1       10
1            


        

Answer 1

select CustID
    from InvoiceTable
    where InvoiceID in (10,20)
    group by CustID
    having COUNT(distinct InvoiceID) = 2