dcwilson2009 (5/15/2014)
How would I convert this query to use a JOIN in the subquery:SELECT ProcDate , MAX(b.DayKey) DayKey
FROM dbo.MyTable a ,
( SELECT MAX(DayKey) DayKey
FROM dbo.MyTable
WHERE ExtractType = 'D'
) b
WHERE ( ExtractType = 'D' )
AND a.Daykey = b.DayKey
GROUP BY ProcDate
Not sure what the question is. Do you need the subquery to join to something else? Or is the question how can you use a join instead of the subquery?
From what you posted I don't understand the need for a subquery here at all.
SELECT ProcDate, MAX(DayKey) as DayKey
FROM dbo.MyTable a
WHERE ExtractType = 'D'
GROUP BY ProcDate
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