[Haskelldb-users] Another try

[Immanuel N. <i.n...@ja...>]

Hello,

this is another try to get help about a question which I have send to
this mailing list about 2 weeks ago under the subject "Missing SQL
features". I haven't received any feedback may be because the traffic is
rather low in this mailing list - so I try again:

I can't find the SQL operators exists (and join) in HaskellDB. Are they
not supported yet or have they different names here?

Basically I need to express in HaskellDB something like:

SELECT DISTINCT store_type FROM stores
  WHERE NOT EXISTS (SELECT * FROM cities_stores
                    WHERE cities_stores.store_type = stores.store_type);

(i.e. asking the question "What kind of store is present in no cities?")

Any hints how to accomplish this in HaskellDB are highly appreciated.

Thanks,
Immanuel