sql - Python: DISTINCT on GQuery result set (GQL, GAE)

Question

Imagine you got an entity in the Google App Engine datastore, storing links for anonymous users. You would like to perform the following SQL query, which is not supported:

SELECT DISTINCT user_hash FROM links

Instead you could use:

user = db.GqlQuery("SELECT user_hash FROM links")

How to use Python most efficiently to filter the result, so it returns a DISTINCT result set? How to count the DISTINCT result set?

Answer 1

Waitting for answers