shsql is a command-line SQL DBMS that stores data in flat files.
Despite claiming to be open-source, no binaries or source for the DBMS are publicly available. The last update of the project was in 2013.
Relational
SQL Command-line / Shell
http://quisp.sourceforge.net/shsqlhome.html
https://sourceforge.net/projects/shsql/
Steve Alt
2002
2013
Open Source
Linux
GPL v2