APPROXIMATE COUNT (DISTINCT) or COUNT (DISTINCT)

swagner
swagner 🟢
in Data Platform & Data Science

Can anyone explain the difference in these two functions?  Why use one vs' the other?

Comments

  • ST_-Superman-_
    ST_-Superman-_ 🟤

    I found this article on APPROX_COUNT_DISTINCT:

    https://docs.memsql.com/sql-reference/v6.0/approx_count_distinct/

     

    Hope that helps.  It looks to be a performance issue when dealing with very large data sets.


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  • swagner
    swagner 🟢

    This appears to be a SQL function.  I'm looking for info on a beastmode function.  

     

    I may have mistated the syntax, should be:

    APPROXIMATE_COUNT_DISTINCT()

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