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use inner query result in main query order by

Posted on 2011-03-08
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Last Modified: 2012-05-11
Hello experts,

i have inner queries results in main query and i want to sort that inner query result using order by tag in main query.

say for example:

Tablename:  Product

Tablename: Product_review

Relation: both tables connected using Property table id and Product_review table productid

so it will come like

Select p.*,(select Count(*) from Product_review pr where pr.productid=p.id) as pro_review from Product p

Now what i want is something like :

Select p.*,(select Count(*) from Product_review pr where pr.productid=p.id) as pro_review from Product p order by pro_review desc

but its not working when i run its asking me pro_review value as its not part of main tables but its a part of query result.

How do we achieve it using single sql query ?

Thanks
Kinjal
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Question by:dotsandcoms
  • 4
6 Comments
 
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Accepted Solution

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derekkromm earned 500 total points
ID: 35068833
select * from (Select p.*,(select Count(*) from Product_review pr where pr.productid=p.id) as pro_review from Product p) a order by pro_review desc
0
 
LVL 35

Expert Comment

by:YZlat
ID: 35069008
try something like this

SELECT p.*, COUNT(pr.productid) As pro_review
FROM Product as p
INNER JOIN Product_review pr ON p.id=pr.productid
ORDER BY COUNT(pr.productid) DESC
0
 
LVL 35

Expert Comment

by:YZlat
ID: 35069017
SELECT p.*, COUNT(pr.productid) As pro_review
FROM Product as p
INNER JOIN Product_review as pr ON p.id=pr.productid
ORDER BY COUNT(pr.productid) DESC
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 
LVL 35

Expert Comment

by:YZlat
ID: 35069190
actually you cna't do p.*, you will have to list all the columns and then add a GROUP BY clause
0
 
LVL 35

Expert Comment

by:YZlat
ID: 35069198

SELECT p.id, p.ProductTitle, p.AnotherField, COUNT(pr.productid) As pro_review
FROM Product as p
INNER JOIN Product_review as pr ON p.id=pr.productid
GROUP BY p.id, p.ProductTitle, p.AnotherField
ORDER BY COUNT(pr.productid) DESC
0
 

Author Closing Comment

by:dotsandcoms
ID: 35078951
simply best
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

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