Hi Fabio,
This should work. You can use the _sum builtin as reduce:
"reduce":"_sum"
You then need to query your view with the proper group level and a
startkey and endkey:
GET
db/_design/power/_view/watt?group_level=2&startkey=[2011,3]&endkey=[2011,4]&inclusive_end=false
That gives you the sum for the month of March.
On 06/09/11 09:06, Fabio Di Bernardini wrote:
Il 09/06/2011 17:18, Fabio Di Bernardini ha scritto:
If I have a map function emitting a timestamp as key ad a number as
document, how to get sum of values selecting a date range?
More datails here:
http://stackoverflow.com/questions/6294794/how-to-sum-values-of-a-view-in-a-date-range-using-couchdb
