Using a Spring Boot app with JpaRepository to query a DB2 database for the first time. How would I go about doing a sysout with say the first 20 rows? Just want to test that I am able to access the table data. Lastly, this DB2 table has about 24 columns but I'm not seeing a specified primary key on this table. Using platinum via TSOA to view table data. I imagine there is a command to find the PK but my research has failed to find the answer.