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Editorial Team
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Asked: 2026-06-11T15:16:00+00:00

Based on the bigquery query reference, currently Quantiles do not allow any kind of

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Based on the bigquery query reference, currently Quantiles do not allow any kind of grouping by another column. I am mainly interested in getting medians grouped by a certain column. The only work around I see right now is to generate a quantile query per distinct group member where the group member is a condition in the where clause.

For example I use the below query for every distinct row in column-y if I want to get the desired result.

SELECT QUANTILE( <column-x>, 1001)
FROM <table>
WHERE 
    <column-y> == <each distinct row in column-y>
  1. Does the big query team plan on having some functionality to allow grouping on quantiles in the future?
  2. Is there a better way to get what I am trying to get here?

Thanks

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1 Answer

  1. Editorial Team

    While there are efficient algorithms to compute quantiles they are somewhat memory intensive – trying to do multiple quantile calculations in a single query gets expensive.

    1. There are plans to improve QUANTILES, but I don’t know what the timeline is.
    2. Do you need median? Can you filter outliers and do an average of the remainder?
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