Comment by jve

- Why not? https://www.sqlite.org/appfileformat.html

- Its size is less than a megabyte: https://sqlite.org/footprint.html

- 750KB if all features are enabled: https://www.sqlite.org/about.html

- Looks like fair amount of functionality can be left out when compiling sqlite and with options to influence/strip down query planner: https://www.sqlite.org/compile.html

- And "SQLite does not compete with client/server databases. SQLite competes with fopen()": https://www.sqlite.org/whentouse.html

In the end, you don't need a database, but a library that gives you database API and behavior.