snake_case because if your column ends up in a Postgres/MySQL environment your CamelCase will be become camelcase

And reading those becomes nightmares

If you are just working in Javascript/Node.js, CamelCase is the preferred option.

It's camelCase, not CamelCase

I believe this is PascalCase

SHOUTY_CASE

Depending upon how you organize the words within them (*_id, *_name, *_percent), snake case allows you to parse the column names dynamically for things like santization and formatting.