Snowflake: Unsupported subquery for DISTINCT - Column order matters?

Question

I have two related tables (unnecessary columns not listed):

LOCATION

VENUE_ID - NUMBER(38,0)

VISIT

Answer 1

I think you're making this more complex than this needs to be. Below should be all you need:

SELECT l.venue_id
  , count(distinct v.device_id)
FROM location l
LEFT JOIN visit v
 on l.venue_id = v.venue_id
GROUP BY l.venue_id