I would like to install sneak preview(full java edition).
and we have to provide any of the databases(oracle, sql server,db2) kind of databases.
What is the use of these databases?
what exactly the structure of these databases in terms of portal?
Database is the place where all your data sits on. the reply sounds kiddish.. but its THE REPLY.. all your standard - screens, tables, reports, transactions, and user defined screens, tables etc are stored in tables only.
So, DB is the foundation. In the case of Stand alone Java Stack, all your METADATA information gets stored in the db.
Data pertaining to your Visual administrator functions are saved only in Tables.
Hope this cleared your doubt.