Free portable database [closed]

Answer 1

Tokyo Cabinet would be a good candidate, except it isn't relational (so no SQL).
Given you don't have so many records, maybe a full relational database is overkill for your needs. Or not, it depends on your application, of course.

Answer 2

Not sure it meets the no install requirement but if you need more than SQLite check Apache Derby.

Answer 3

SQL Server Compact

Answer 4

Depending on your problem, you may consider Ms Access.

You can connect to Access database through Jet engine which is installed on Windows XP and newer.

Since v2002 it is SQL 92 compliant (as Microsoft claims).

Answer 5

Edit: Ooops, apparently I meant SQL Compact, not express

Answer 6

SQLite:

self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain.

-Adam