To define a data model based on the ABAP CDS view concept, you first need to create a DDL source as the relevant ABAP repository object using a wizard in ABAP Development Tools.
Task 1: Create a DDL Source for CDS View
In the second step, you will implement an elementary CDS view from scratch by defining a simple query for sales order items based on a single data source from EPM demo application.
Task 2: Implement the CDS View as Data Model
In the last task of this section, you have the option to try out the test environment for verifying the output (result set) of the CDS view you have just implemented.
Task 3: Verify the Result Set in the Data Preview Tool