DROP DOMAIN SQL - Language Statements DROP DOMAIN remove a domain DROP DOMAIN domainname [, ...] [ CASCADE | RESTRICT ] DROP DOMAIN will remove a domain. Only the owner of a domain can remove it. domainname The name (optionally schema-qualified) of an existing domain. CASCADE Automatically drop objects that depend on the domain (such as table columns). RESTRICT Refuse to drop the domain if any objects depend on it. This is the default. DROP DOMAIN Message returned if the command was successful. ERROR: RemoveDomain: type 'domainname' does not exist This message occurs if the specified domain does not exist. To remove the domain box: DROP DOMAIN box; This command conforms to the SQL standard.