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CTE to find average


CTE to find average

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sharonsql2013
sharonsql2013
Ten Centuries
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Group: General Forum Members
Points: 1236 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
SSChampion
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Group: General Forum Members
Points: 13440 Visits: 14096
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
SSCertifiable
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Group: General Forum Members
Points: 5150 Visits: 2692
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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