SQLite

SQLite is a small, fast, embeddable SQL database engine that supports most of SQL92, including transactions with atomic commit and rollback, subqueries, compound queries, triggers, and views. A complete database is stored in a single cross-platform disk file.

In order to get to know this database and how to embed it into a c program, I have written a small demo program.

There is also a demonstration on using bind variables in insert statements.

sqlite control center is a visual tool for working with SQLite databases.

There is also SQlite Wrapper: a C++ wrapper for SQLite. By the way, Joel on software reader is an application I wrote that uses this wrapper.