You create an application by using the Microsoft .NET Framework 3.5 and Microsoft
ADO.NET.The application contains a DataSet class. The DataSet class contains two tables
named Order and OrderDetail as shown in the following exhibit.OrderDetail as shown in the
following exhibit.
You add a DataColumn class named OrderTotal to the Order table.You need to ensure that
the OrderTotal column stores the sum of the values in the LineTotal column of the
OrderDetail table.Which expression string should you use to set the Expression property of
the OrderTotal column?
A.
“Sum(OrderDetail.LineTotal)”
B.
“Sum(Relationship.LineTotal)”
C.
“Sum(Order_OrderDetail.LineTotal)”
D.
“Sum(Child(Order_OrderDetail).LineTotal)”