Did you really have to be that guy ?
What he meant basically is using a relational database.
Please refer to the HN guidelines before commenting. It strongly encourages to have comments that add value to the discussion.
TiDB (distributed)
CockroachDB (distributed)
Crate (uses SQL but isn't even relational)
They all use SQL.
Picking between these and more established SQL databases is worthy of discussion.
Heck, based on what I see on Hacker News, picking between the established ones generates a lot of discussion, usually with people preferring Postgres over MySQL, etc.
Then there's SQLite, which is completely different again.
OP probably has a favourite database as a go-to regardless of the application, but for some projects SQLite might be a better fit than the others, for example. That would warrant discussion.
In conclusion, I believe you were too harsh to TekMol.
Edit: Fix autocorrect fails and add clarity.