Free database I can include with my for-fee application

[zydeholic]

I'm reading the boilerplate licensing agreement right now for MySQL, and it SEEMS that they are saying that if I bundle MySql into my application, I may not charge for said application. Not sure if I'm actually bundling it as such in reality, but, it will be used to store and retrieve data generated by my program.

If MySql is out of the picture, what other free database products can I use? I'm trying to download SQLite, and it is not cooperating well.

[JLBorges]

PostgreSQL https://www.postgresql.org/ could be a reasonable choice.

It is free (free as in freedom) with a non-viral license quite akin to the BSD two clause or MIT licenses.
https://www.postgresql.org/about/licence/

[zydeholic]

I have a book on it right here, but never really delved into it.