Requirements for database applications

Hey all,
I have a couple of questions:
Is it possible to create applications with databases in a standalone way?
If I made an application that uses JDBC what would any users of the application require to use it? (if they could install it on their own computers) would they need database software installed?
Is there any alternative methods you would recommend using rather than a database? for example if I were to store family tree data, a database seems logical, but would you use an alternative storage method?
Thank you!

If I made an application that uses JDBC what would any users of the application require to use it? (if they could install it on their own computers) would they need database software installed?Usually you'll need a JDBC driver, which is a single jar file. No other DB software is usually needed on a DB client.
(Fine print: there are types of drivers that need e.g. .dll files installed, or other cruft like that. But mainstream DBs usually do it the easy way: one .jar file. The driver jar connects to the DB server over the network, sends SQL commands to it, and receives results.)
You'll need a DB server program. It can run on the same computer as the client, or a different one. The DB vendor will have an install procedure for the server. There are small ("embedded") DB servers, and big ("Oracle" :-) ones. The smallest DBs can even be a single jar file that contains the JDBC API and the code that stores the data in files - no other components needed.
Is there any alternative methods you would recommend using rather than a database? for example if I were to store family tree data, a database seems logical, but would you use an alternative storage method?There are a number of different ways to store data. Files come to mind. For the example of a family tree, a relational database seems a pretty good fit. The devil is in the details.

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