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Re: Why does a group_concat on a join change aggregate values?




On 2015/05/07 19:42, Paul Halliday wrote:
Should have showed the whole thing. Take a look here (click image to see
full output):

http://www.pintumbler.org/tmp

I don't see why this worries you. Joining often increases variation. Indeed, if in some case an inner join never did, maybe the joined tables are needlessly separate.

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