The length of DB mangas differs. It depends on factors like the story's complexity and the author's vision. Some might run for just a few volumes, while others could have dozens.
I'm not sure specifically which 'Alex and Ani Christmas Story' you mean. It could be a story related to the Alex and Ani brand during Christmas. Maybe it's about special Christmas collections they launched, like how they designed Christmas - themed jewelry. For example, they might have created bracelets with Christmas symbols such as snowflakes or reindeer.
I'm not sure specifically what 'db new story' is about without more context. It could be a new story related to a database (db), perhaps a new narrative within a database - related project, like a new data - entry story or a new development in a database system's history.
In my view, 'fiction db' is probably a term used in a particular field or industry related to fiction. It could be a database used by authors, publishers, or researchers to organize and access data about fictional works. But again, we'd need more details to know for sure.