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use inner query result in main query order by

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

ASKER CERTIFIED SOLUTION

derekkromm

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YZlat

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

YZlat

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

YZlat

actually you cna't do p.*, you will have to list all the columns and then add a GROUP BY clause

YZlat

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

dotsandcoms

ASKER

simply best