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 Transact-SQL (2008)
 Get the count of a subcategories
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mary_itohan
Posting Yak Master

191 Posts

Posted - 11/08/2012 :  09:32:17  Show Profile  Reply with Quote
hi guys,
am a bit confused as a have a table with a PK and FK using categories and sub categories tables.

The fk is the categoryID which is an int ( and not the name )

How do i get the count of the categories in the sub_cat table

here is my code

many thanks

SELECT     dbo.Gifts_Category.CategoryName, COUNT(dbo.Gifts_SubCategory.SCName) AS 'mary'
FROM         dbo.Gifts_Category INNER JOIN
                      dbo.Gifts_SubCategory ON dbo.Gifts_Category.CategoryID = dbo.Gifts_SubCategory.CategoryID
GROUP BY dbo.Gifts_SubCategory.SCName, dbo.Gifts_Category.CategoryName


_____________________


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jimf
Flowing Fount of Yak Knowledge

USA
2869 Posts

Posted - 11/08/2012 :  09:45:51  Show Profile  Reply with Quote
If you just want a count of how many sub categories are associated with a CategoryName:

SELECT dbo.Gifts_Category.CategoryName, COUNT(DISTINCT dbo.Gifts_SubCategory.SCName) AS 'mary'
FROM dbo.Gifts_Category INNER JOIN
dbo.Gifts_SubCategory ON dbo.Gifts_Category.CategoryID = dbo.Gifts_SubCategory.CategoryID
GROUP BY dbo.Gifts_Category.CategoryName

You don't ever want to count, sum, etc. things you are grouping by

Jim



Everyday I learn something that somebody else already knew
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mary_itohan
Posting Yak Master

191 Posts

Posted - 11/08/2012 :  11:05:19  Show Profile  Reply with Quote
ok tnx

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Yes O !
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