If you prefer Java to C, I recommend taking a look at the source for H2, a pure Java SQL database engine. It is surprisingly easy to follow. I've contributed t

If you prefer Java to C, I recommend taking a look at the source for H2, a pure Java SQL database engine. It is surprisingly easy to follow. I've contributed to the H2 source code a few times, and in the process I got to learn much about how a database engine is implemented. H2 home: http://www.h2database.com/ http://www.h2database.com/ H2 Github repo: https://github.com/h2database/h2database https://github.com/h2database/h2database