zoov-w commented on issue #10519:
URL: https://github.com/apache/druid/issues/10519#issuecomment-716188986


   Hi, maybe you can read this document 
https://druid.apache.org/docs/latest/querying/topnquery.html#aliasing, If you 
are wanting the top 100 of a high cardinality, uniformly distributed dimension 
ordered by some low-cardinality, uniformly distributed dimension, you are 
potentially going to get aggregates back that are missing data.
   
   


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