Advertisement

09.07.2008 at 09:44PM PDT, ID: 23711094
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.4

Need help in understanding an outer join. I have an example

Asked by brgdotnet in SQL Server 2005, MS SQL Server

I am trying to learn more about using the right outer join statement.
Below is the problem to be solved along with the Correct outer join that
solves the problem.

Return the StudentID, First Name, and Last Name of those individuals
 in the Student table who are not in the HomeEconomics class

Students Table
----------
StudentID
FirstName
LastName

HomeEconomincs Table
-----
ClassID
StudentID


      SELECT  s.StudentID, s.FirstName, s.LastName  FROM HomeEconomics h
      RIGHT OUTER JOIN Students s
      ON h.StudentID = s.StudentID
      WHERE s.StudentID IS NULL
------------------------------------------
What I dont understand is why isn't the outer join performed on the HomeEconomics Table
as opposed to the Students table? My thinking is that the query should be like the following,
but I am WRONG! So if anyone can help me to understand the solution I would appreciate it.Start Free Trial
[+][-]09.07.2008 at 10:01PM PDT, ID: 22414743

View this solution now by starting your 7-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

 

About this solution

Zones: SQL Server 2005, MS SQL Server
Sign Up Now!
Solution Provided By: QPR
Participating Experts: 3
Solution Grade: A
 
 
[+][-]09.07.2008 at 10:25PM PDT, ID: 22414791

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 7-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]09.08.2008 at 12:03PM PDT, ID: 22420448

Assisted solutions are selected by the member who asked the question as a comment that contributed to their question's solution.

Start your 7-day free trial to view this Assisted Solution or ask the Experts your question.

 
[+][-]09.08.2008 at 12:04PM PDT, ID: 22420468

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 7-day free trial to view this Expert Comment or ask the Experts your question.

 
 
Loading Advertisement...
20080716-EE-VQP-32 / EE_QW_2_20070628