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CTE to find average


CTE to find average

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sharonsql2013
sharonsql2013
SSCrazy
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Group: General Forum Members
Points: 2612 Visits: 1265
I am trying to get the average for number of Ids per day

But , some how I get "0".
Can anyone suggest

With CTE1
As
(
SELECT
count([ID]) as No_OF_IDS,
Days

FROM [Proddata]
LEFT OUTER JOIN SupplyData as S ON Proddata.Group = S.Group
GroupBy Days
)

Select Sum(ISNULL(No_of_IDS,0))/Sum(ISNULL(Days,0))
from CTE1
pietlinden
pietlinden
SSC-Dedicated
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Group: General Forum Members
Points: 31736 Visits: 15140
How about:

SELECT x.Days, AVG(x.No_Of_IDs) As AvgCount
FROM
( SELECT Days,
count([ID]) as No_OF_IDS
FROM [Proddata]
LEFT OUTER JOIN SupplyData as S ON Proddata.Group = S.Group
GroupBy Days
) x
GROUP BY x.Days;

No CTE required.
twin.devil
twin.devil
SSChampion
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Group: General Forum Members
Points: 12258 Visits: 2897
sharonsql2013 (12/6/2013)
I am trying to get the average for number of Ids per day

But , some how I get "0".
Can anyone suggest


It giving zero because there might be not data matching against the join you are using, try to change the query to the inner join to check if there any results you find, 2ndly there is not need to CTE, desire result can be achieve through a simple query.
Go


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