Ask HN: Tutorial / reference for building db backed web apps with express/node?

On here it's common to see node/express recommended for creating database backed web apps. I know this is possible and I've done it a little myself.

I was wondering if you have any recommended guides which assume connection to a relational db (I use Oracle/SQL Server and Postgres a little). I suppose I was thinking of something similar to the rails tutorial? I'm aware of the MEAN stack books but guess they're focused on Mongo which I'm not really interested in. My background is in databases, Java Spring/C# web api and some front end stuff.

Thanks.