Ownership of a database object carries with it privileges to carry out actions on that object.
The creator of a database object may not necessarily be its owner. Another user can be designated as owner during the create process. If no owner is specified, the creator is the owner.
The owner of a table can modify the table structure, for instance, or can grant privileges to other database users to update the information within the table.
A user with the ALTER ANY OBJECT system privilege can modify any database object (regardless of owner) that can be created using the CREATE ANY OBJECT system privilege. A user with the CREATE ANY OBJECT system privilege can create database objects to be owned by other users.