Thaks both, i will see those options. On 7 oct, 13:18, Robert Kluin <[email protected]> wrote: > There are a couple other option too. You could also use some form of > materialized views Brett cover in his high throughput data pipelines > talk.http://code.google.com/events/io/2010/sessions/high-throughput-data-p... > > Robert > > On Thu, Oct 7, 2010 at 12:04, Jeff Schwartz <[email protected]> wrote: > > IMO you should maintain a separate set of entities (sharded) for any > > aggregate type of information that you wish to maintain. See Google 2009 > > YouTube video for info on sharded counters - sorry I don't have the url at > > hand but it is easy to find via Google search. > > > Also, stay away from count method even though it can now provide results > > greater than 1000 - it does not work anything like the one that SQL provides > > & is extremely costly. > > > Jeff > > > On Thu, Oct 7, 2010 at 11:57 AM, nacho <[email protected]> wrote: > > >> Hi, i need to do something like this: > > >> SELECT sum(ammount) FROM purchases > > >> or something like this: > > >> SELECT count(*) FROM sales > > >> But the datastore only let me load 1000 entities, so... is there any > >> simple way to do something like that? > > >> For example, one of my clients have more than 10.000 purchases, and he > >> wants to know how many sales he haves right now, how can i get that > >> number? Or how can i get the sum of the ammount of all purchases? > > >> -- > >> You received this message because you are subscribed to the Google Groups > >> "Google App Engine" group. > >> To post to this group, send email to [email protected]. > >> To unsubscribe from this group, send email to > >> [email protected]. > >> For more options, visit this group at > >>http://groups.google.com/group/google-appengine?hl=en. > > > -- > > Jeff > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group at > >http://groups.google.com/group/google-appengine?hl=en.
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