DBA_OBJECTS

Column Name	Description
CREATED	Timestamp for the creation of the object
DATA_OBJECT_ID	Object number of the segment which contains the object
GENERATED	Was the name of this object system generated?
LAST_DDL_TIME	Timestamp for the last DDL change (including GRANT and REVOKE) to the object
OBJECT_ID	Object number of the object
OBJECT_NAME	Name of the object
OBJECT_TYPE	Type of the object
OWNER	Username of the owner of the object
SECONDARY	Is this a secondary object created as part of icreate for domain indexes?
STATUS	Status of the object
SUBOBJECT_NAME	Name of the sub-object (for example, partititon)
TEMPORARY	Can the current session only see data that it place in this object itself?
TIMESTAMP	Timestamp for the specification of the object

All objects in the database.