Q. What is SQL enhancement ( CDS ) ? à Annotation to enrich the data models with additional details (all annotations starts with symbol @) à DB Entities are connected using Association at conceptual level (replacement of join conditions Expressions – used to code calculation in queries Q. What are different types of CDS? 1. ABAP CDS 2. HANA CDS Q. How to Define a CDS view? Ans. CDS view is defined using CDS data definitions.:-> Also known as CDS document or CDS source code. To create CDS views we need to use ADT. On activation it creates a CDS SQL view ( SE ) and a CDS entity