SQL Select comparing two tables with different orientations

How can I join two tables with different orientations?  Table A lists each attributeID horizontally.  Table B below lists each attributeID vertically.  I need to find  all the attributeID's from TABLE A that  have a value and category not listed in TABLE B.
There are 400 attribute ID's.  

Table A (Products)
A_100      A_200       A_300     Category
   S               C                B           WebFolder1
   S               C                B           WebFolder2

Notice how A_300 has value of "B" for WebFolder1.   A_300 and Webfolder1 do not exist in Table B and this is what I need this SQL to do.  Find attribute to category discrepancies between table A and B.

Table  B  (Configuration)
AttributeID      WebFolder
----------------       ------------
A_100              WebFolder1
A_200              WebFolder1
A_100              WebFolder2
A_200              WebFolder2
A_300              WebFolder2

Expected Result:
AttributeID   WebFolder
    A_300         WebFolder1
tmajor99Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ste5anSenior DeveloperCommented:
Dig into your data model. Does a normalized version of your data exists? Means is this a view or really a table?

When it is a table, then you need to normalized it by using UNPIVOT. E.g.

SELECT  Category,
        AttributeType,
        AttributeValue
FROM    TableA
UNPIVOT (   AttributeValue
            FOR AttributeType IN ( A_100, A_200, A_300)) U;

Open in new window


Use the result set either as CTE or materialized table to use FULL JOIN or INTERSECT/EXCEPT for comparision of both sets.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
SQL

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.