Question

I have entities of kind Users. Each user entity belongs to a different
entity group. Is it possible to perform a query by Kind with equality
filters on certain properties e.g date_of _birth and zipCode. The aim
is to get the entities with no intention of modifying them

Answer 1

Yeah, you can add filter to query like this:

Query q = new Query(kind);
q.addFilter("zipCode", FilterOperator.EQUAL, "11000");
PreparedQuery pq = datastore.prepare(q);
return pq.asIterable();