> Hi. If I create a column without a domain, a domain will be create
> automatically. If I drop my column, this domain that was created
> automatically will be deleted?

Yes.

However, if you create a domain, and then use this domain
as the base-data-type in a column, and you drop that column,
the domain will not be deleted.

With regards,

Martijn Tonies
Database Workbench - the developer tool for InterBase & Firebird
Upscene Productions
http://www.upscene.com