AndrewTavis_WMDE added a comment.

  @Manuel, just a note on using the `wmf.webrequest` table: now that I'm using 
Spark a bit more and can see the number of steps, it's definitely worth it to 
try to restrict the data based on the year and month as we're doing. Selecting 
30 days over two months takes dramatically longer than if we set the month 
column in the `WHERE` clause - roughly three times longer based on number of 
steps.
  
  Some bad news, the following query returns no distinct values for the 
`ch_ua_mobile` column:
  
    
    SELECT
        DISTINCT(ch_ua_mobile) AS ch_ua_mobile_values
        
    FROM 
        wmf.webrequest
    
    WHERE
        year = 2023
        AND month = 7
        AND '2023-07-01' <= dt
        AND dt < '2023-08-01'
        AND uri_host = 'www.wikidata.org'
  
  I've asked in `working-with-data` as we discussed :)

TASK DETAIL
  https://phabricator.wikimedia.org/T336361

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: AndrewTavis_WMDE
Cc: AndrewTavis_WMDE, Michael, Manuel, Aklapper, Danny_Benjafield_WMDE, 
Astuthiodit_1, karapayneWMDE, Invadibot, maantietaja, ItamarWMDE, Akuckartz, 
Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, 
rosalieper, Scott_WUaS, Wikidata-bugs, aude, Mbch331
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