When I opened the System:Database Landing page under schema tools I couldn’t see any database schema like PEGADATA.
@krishnakanthv2011 can you confirm what database you are using?
The Schema Tools landing page is available to Pega Cloud customers using a Pega-hosted instance and a Postgres database and it is available for on-premises customers who use a Postgres database.
The Schema Tools landing page is not available for Pega instances having Oracle database.
Please go through below link for more information: