Hint for queryRaw with PostgreSQL: Postgres lowercases without double quotes + have to prefix table with schema name

[nikolasburk]

Users that are not used to querying PostgreSQL directly but need to use queryRaw for some reason can easily get confused because of some Postgres behaviour, here is an example of that confusion: https://github.com/prisma/prisma/discussions/2664

It would be nice to have a section in the docs that quickly mentions these "gotchas" when querying Postgres with raw SQL.

[janpio]

A more elaborate version of that would be a great thing for the dataguide possibly.

[nikolasburk]

Add to: https://www.prisma.io/docs/concepts/components/prisma-client/raw-database-access#considerations