Saturday, February 25, 2012

pivot table without aggregation?

Hello, I have a resultset as follows:

fields: Name, RankID

values:
Prorduct A, 4
Product B, 33
Product C, 221
(etc)

Name is always unique. RankID may not be.

I want to take that result set and basically pivot it to have the Name
values as columns, and the RankID of each one as the data. So you
would end up with only one row like:

Product A | Product B | Product C | etc
4 | 33 | 221 | etc

Is this possible? I do not want to sum the data or anything, simply
rotate it sort of.

Any advice is appreciated.Something like this should do it:

SELECT SUM(CASE WHEN [Name] = 'Product A' THEN RankID ELSE 0 END) AS
'Product A',
SUM(CASE WHEN [Name] = 'Product B' THEN RankID ELSE 0 END) AS
'Product B',
SUM(CASE WHEN [Name] = 'Product C' THEN RankID ELSE 0 END) AS
'Product C'
FROM PRODUCTS

Note that since your product name is unique the SUM here is just to pull the
data into one row. You could use MAX too but then if there is negative rank
you may have to handle it differently.

If this list of products is very dynamic, then you should look into dynamic
pivoting. Here are a few resources if you want to look in that direction:
http://www.sqlmag.com/articles/inde...articleid=15608
http://www.sqlmag.com/articles/inde...articleid=94268
http://www.sqlteam.com/item.asp?ItemID=2955
Also, most reporting tools have very good support for pivoting.

HTH,

Plamen Ratchev
http://www.SQLStudio.com|||Plamen Ratchev wrote:

Quote:

Originally Posted by

SELECT SUM(CASE WHEN [Name] = 'Product A' THEN RankID ELSE 0 END) AS
'Product A',
SUM(CASE WHEN [Name] = 'Product B' THEN RankID ELSE 0 END) AS
'Product B',
SUM(CASE WHEN [Name] = 'Product C' THEN RankID ELSE 0 END) AS
'Product C'
FROM PRODUCTS


I think SQL Server 2005 has a built-in pivoting function, but I've
never used it so I don't know the syntax.|||"Ed Murphy" <emurphy42@.socal.rr.comwrote in message
news:460c63e2$0$24701$4c368faf@.roadrunner.com...

Quote:

Originally Posted by

>
I think SQL Server 2005 has a built-in pivoting function, but I've
never used it so I don't know the syntax.


Here is how it can be done with PIVOT in SQL Server 2005:

SELECT [Product A],
[Product B],
[Product C]
FROM Products
PIVOT (SUM(RankID) FOR [Name] IN ([Product A],
[Product B],
[Product C])) AS P

I find the PIVOT syntax to be not so intuitive (unlike UNPIVOT which is
easier to use and understand).

Plamen Ratchev
http://www.SQLStudio.com

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