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Is it possible to get counts nested by 2 fields ? For example adverse events by patient sex and reaction type. The result would be something like a 2 dim array.

edit (since this account doesn't have enough reputation to comment on my own question) - not possible yet: thanks, that's what I needed to know. - why do I need it: to build graphics with more than 1 dimension involved (for example stacked bars). - the drilldown possibility: that's certainly useful, but not what I need here. Basically that would require 1 call to the API for each bar in the chart.

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    What would be the reason you would want to do this as opposed to just doing two different queries? We're aiming to reduce complexity whenever possible, but if this feature is important to you for a specific reason it would be great to list it as a feature request as Mark noted. Thanks! – Sean Herron Jun 16 '14 at 15:21
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    @SeanHerron : I would assume it'd be like the SQL query select count(*), field1, field2 from table group by field1, field2. – Joe Jun 16 '14 at 18:03
  • @Joe & Etienne - if you end up bringing up your own OpenFDA ElasticSearch (ES) instance, check out this answer to a very similar question on how to do this using ES: stackoverflow.com/questions/18449703/… – Mark Silverberg Jun 16 '14 at 18:12
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Not at this time. I'm not 100% sure how the team behind OpenFDA is fielding feature requests but I've been putting ideas and requests like this on Github and they have been labeling them as "enhancements.".

Link to OpenFDA github: https://github.com/fda/openfda/issues

EDIT: While OpenFDA was in beta, I built a drill down tool (see http://recordit.co/Hn65jq.gif for screencast) but it's currently broken because the API changed quite a bit.. if something like that seems useful to you I can work to resurrect it :)

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