Categories ABAP DDIC Interview QnA Technical Q&A Is primary key mandatory while creating a table? by Srinidhi Raghothama Posted on 31 March 2021 31 March 2021 2 Primary key is a mandatory field. However, we can have only the MANDT as the primary keyand without any other unique key for the data we want to store. This would allow us to have only 1 entry per client. ABAP DDIC Interview Question Previous Post Can I have custom table with non key field in between key fields? Next Post How to use an RFC in SAP ABAP?