Question

I have this query with an sub query as clicks
I want to do then where clicks > 0, but I get an error that this is not an recognized column.

SELECT top 10 *, (select count(*) FROM po_events aeclk WITH(NOLOCK) where (aeclk.[source] = ae.[source]) as clicks

FROM archived_events ae with(NOLOCK) 
where clicks > 0

Answer 1

While I agree with the comment that this is a possible duplicate, I’d also like to point out that correlated subqueries can be inefficient; killing two birds with one stone, you could do something like:

SELECT TOP 10
        ae.*
      , aeclk.clicks
FROM    archived_events ae
        JOIN ( SELECT   source
                      , COUNT(*) AS clicks
               FROM     po_events
               GROUP BY source
             ) aeclk ON aeclk.[source] = ae.[source]
WHERE   clicks > 0