How to join these two data sources to produce the output shown?

examplejoin.pngHi there, given the above image, what SQL command would join the desired output.  All my join experiments failed to return all data or returned nulls.  I thought about using isnull but in some cases it was the key column that was null and I wasn't sure if this was the right approach.

Thank you!


SQL Server 2000 answer required.
dgloverukAsked:
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.

PortletPaulfreelancerCommented:
FULL OUTER JOIN

SELECT
      ISNULL(t1.customerID, t2.Customer) AS CustomerID
    , Cars
    , Houses
    , Boats
    , Planes
FROM Table1 t1
      FULL OUTER JOIN Table2 t2
                  ON t1.CustomerID = t2.Customer

Open in new window

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
Randy Knight, MCMPrincipal ConsultantCommented:
Here is one solution.

SELECT a.CustomerID, MAX(a.Cars) AS Cars, MAX(a.Houses) AS Houses, MAX(a.Boats) AS Boats, MAX(a.Planes) AS Planes
FROM 
(

 SELECT t1.CustomerID, t1.Cars, t1.Houses, 0 AS Boats, 0 AS Planes
--INTO #tmp
 FROM t1 
	LEFT JOIN t2  ON t1.CustomerID = t2.CustomerID
 UNION ALL 
 SELECT t2.CustomerID, 0, 0, t2.Boats, t2.Planes
 FROM t2 
	LEFT JOIN t1 ON t2.CustomerID = t1.CustomerID
) a
GROUP BY a.CustomerID

Open in new window

0
dgloverukAuthor Commented:
Thanks PortletPaul, Randy,
Whilst Paul your solution looked elegant it wasn't quite what was needed , nulls came back instead of 0's which I think I could get around by using isnull.  Randys solution worked great.  Paul spotted the deliberate mistake on my primary key name joining customer on customerid in his example :)
0
PortletPaulfreelancerCommented:
>>"nulls came back instead of 0's "
...

so use ISNULL()

    , Cars

    , ISNULL(Cars,0)
0
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
Microsoft SQL Server

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.