gqlquery

What I'm looking for a simple Aggregate Functions that are widely available in versions of SQL. Simple things like Select Count(*) from table1 to the more complex. If these are available, is there some documentation you could point me to? Thanks - Giggy The SQL aggregate functions are not available. What you want to do is follow patterns like the sharded counters example: http://code.google.com/appengine/articles/sharding_counters.html which explain that instead of aggregating the values on queries, you want to keep the counters up to date when the values are inserted, updated, or deleted. The

I have a simple table in Google App Engine with a date field. I want to query all the rows with the date field valued between now and 6 hours ago. How do I form this query? SELECT * FROM simpletable WHERE datefield < DATETIME(year, month, day, hour, minute, second) computing those year, month, &c, in your application code. I know you say GQL, but here's a python helper function I use: import datetime def seconds_ago(time_s): return datetime.datetime.now() - datetime.timedelta(seconds=time_s) There may well be a more concise way to write it: I'm not a python expert and went with the first thing

I figure one way to do a count is like this: foo = db.GqlQuery("SELECT * FROM bar WHERE baz = 'baz') my_count = foo.count() What I don't like is my count will be limited to 1000 max and my query will probably be slow. Anyone out there with a workaround? I have one in mind, but it doesn't feel clean. If only GQL had a real COUNT Function... +1 to Jehiah's response. Official and blessed method on getting object counters on GAE is to build sharded counter . Despite heavily sounding name, this is pretty straightforward. You have to flip your thinking when working with a scalable datastore like GAE