[Haskell-beginners] Recommended DB layer?

[harry]

Jeremy Shaw <jeremy <at> n-heptane.com> writes:

> For example, I believe that at one point in time (no idea about right
now), persistent could not do SQL-level joins -- because not all backends
could support joins..

I don't know how persistent is implemented, but the usual solution to a
problem like that is that the capable backends will implement joins in SQL,
while the others fake it in code.