Rolling unique user counts
Posted by:
Paul Stam
Date: August 09, 2016 02:06AM
Hi!
We collect user data and report on unique visitors. On big periods, these queries take a long time and we have no option in aggregating periods into larger periods.
Rick James suggests to use bitstrings where a userid is being hashed (md5 for instance) and that hash mapped to a single bit inside this bitstring.
How can this mapping be done?
the explanation is also available here:
http://mysql.rjweb.org/doc.php/uniques
Any help is greatly appreciated! :)
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