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hi Maria - what data sources do you have defined?

I selected the postgres one for this experiment

right, we make some assumptions

Yes

what did you set for the trackingCallback ?

mixpanel

I see - we currently don’t support joining one experiment across different data sources

hmmm so what you are saying is that I need to store the experimentid and variationid in a table in postgres?

yes - so you can either push that metric to mixpanel, or also add a tracking call for postgres (you can add both mixpanel and postgres in that call - or use something like Segment or Rudderstack to do the pipelining)

Ok Thank you Graham