Complex count distinct

I have a dataset with session IDs and pages... I want to know how many distinct session IDs include a specific page ('ABC'). The trick is one session ID could have multiple rows with page ABC...

Session ID -- Page

123 -- ABC

123 -- ABC

123 -- DEF

456 -- DEF

456 -- ABC

789 -- GHI

Hypothetically, how do I create a beastmode to count distinct session IDs with ABC as 2?

Best Answer

  • MarkSnodgrass
    MarkSnodgrass Portland, Oregon 🥷
    Answer ✓

    Have you tried this:

       CASE WHEN `pageid` = 'ABC' then `sessionid`end

    This should do it

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