The Library is currently in the process of being upgraded from Oracle Database Version to 188.8.131.52
and version 18.0 is going to be available soon.
Demos are being upgraded to reflect the new Container paradigm as well as EBR (Edition Based Redefinition) and may contain references to CDBs, PDBs,
and other objects you may not be familiar with such as CDB_OBJECTS_AE:
Welcome to 12c and beyond.
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... scroll down the page and you will find links to the largest collection of Oracle Database demos on the net.
Restore points are used with Flashback Database to create points-in-time to which the database can be flashed back at a later time if desired.
Related Data Dictionary Objects
FLASHBACK ANY TABLE
SELECT ANY DICTIONARY
SELECT CATALOG ROLE
To create a normal restore point, you must have either SELECT ANY DICTIONARY or FLASHBACK ANY TABLE privilege. To create a guaranteed restore point, you must have the SYSDBA system privileges.
To view or use a restore point, you must have the SELECT ANY DICTIONARY or FLASHBACK ANY TABLE system privilege or the SELECT_CATALOG_ROLE role.