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SAP Exam C_HANADEV_18 Topic 7 Question 22 Discussion

Actual exam question for SAP's C_HANADEV_18 exam
Question #: 22
Topic #: 7
[All C_HANADEV_18 Questions]

What statement must you insert to the following OData service to complete the navigation definition from the customer entity set to the corresponding sales orders? Please choose the correct answer.

service{ "sample.odata::customer" as customer" navigates ("Customer_Orders* as "toOrders); "sample.odata::salesorder" as "Orders";)

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Suggested Answer: B

To complete the navigation definition from the customer entity set to the corresponding sales orders, you need to insert an association statement between the two entity sets. An association defines a relationship between two entity sets based on a referential constraint, which specifies the foreign key and the principal key properties that link the entity sets.An association also defines the cardinality and the role names of the entity sets involved in the relationship1. In this case, the association statement should look something like this:

association Customer_Orders with referential constraint principal customer key CustomerID dependent Orders key CustomerID multiplicity ''1'' to ''*'';

This statement defines an association named Customer_Orders that relates the customer entity set with the Orders entity set based on the CustomerID property. The principal role is assigned to the customer entity set, which means that each customer entity can have zero or more related Orders entities.The dependent role is assigned to the Orders entity set, which means that each Orders entity must have exactly one related customer entity2.

The other options are not correct because:

Aggregation: This is a feature of calculation views that allows you to define measures and attributes for analytical queries.It is not related to OData service definitions3.

Key specification: This is a clause that you use to define the key properties of an entity type in an OData service definition.It is not used to define navigation between entity sets1.

Join condition: This is a clause that you use to specify how to join two tables or views in a SQL statement.It is not used to define navigation between entity sets4.


by Jess at Mar 15, 2024, 02:38 AM

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Eve
1 days ago
I agree with Ryan, because we need to define the relationship between customer and sales orders.
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Ryan
2 days ago
I think the correct answer is B) Association.
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