Domain 

Domain definitions enable ranges of values to be defined and designated for table columns.

Each value range definition has a name that is unique within the overall database system.

If a domain was defined without an owner, the catalog sections (part catalogs) are searched in the following order to locate the specified value range:

  1. Catalog part of the current owner
  2. Catalog part of the DBA who created the current user
  3. Catalog part of the SYSDBA

See also:

Domain name

CREATE DOMAIN statement