题目内容

You have a DataSet object named YourDataSet. This object contains two DataTable objects named Customers and Orders. Customers has a column named CustomerlD, which is unique to each customer. Orders also has a column named CustomerlD.You want to use the GetChildRows method of the DataRow object to get all orders for the current customers.What should you do?

2021-12-25

A.Add a foreign key constraint on CustomerlD of Orders between Customers and Orders

B.Add a data relation to YourDataSet on OrderlD between Customers and Orders

C.Create a unique constraint on CustomerlD of Customers

D.Create a primary key on CustomerlD of Customers

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