sqlite3

I just tried sqlite. It is ultra-light and support SQL commands. Just try this

$ sqlite3 test.db
SQLite version 3.26.0 2018-12-01 12:34:55
Enter ".help" for usage hints.
sqlite> create table t(x number);
sqlite> insert into t values(1);
sqlite> select * from t;
1
sqlite>
$ du -h test.db
8.0K test.db

I just created a database, a table and a row, issued one select. Used 8K on my home directory.

[satire on]What else do you expect from a database?[satire off]