Advertisement

07.02.2007 at 12:30PM PDT, ID: 22671367
[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!

8.8

swap values b/w 2 rows having uniqueness constraints

Asked by izloch2 in MySQL Server

Hi!

I'm running MySQL 4.3. I have a table m_Tree with the following constraints:

UNIQUE KEY `Parent_UID_2` (`Parent_UID`,`Number`,`Entity_Type`),  

I need to swap values in Number column b/w two rows. I wrote the following query

update       m_Tree as A, m_Tree as B, m_Tree as C, m_Tree as D
set       A.Number=D.Number, B.Number=C.Number
where   A.Node_UID='1' and B.Node_UID='2' and A.Node_UID=C.Node_UID and B.Node_UID=D.Node_UID;

However, when I run it, I got an error:

Error Code : 1062
Duplicate entry '5-1-6' for key 2

Is there any way to temporarily turn off uniqueness constraints and then turn it on?

Thank youStart Free Trial
[+][-]07.02.2007 at 01:14PM PDT, ID: 19406591

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

Zone: MySQL Server
Sign Up Now!
Solution Provided By: dqmq
Participating Experts: 2
Solution Grade: A
 
 
[+][-]07.20.2007 at 12:24PM PDT, ID: 19534283

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.

 
[+][-]09.02.2008 at 03:52PM PDT, ID: 22372453

Experts Exchange has a courteous staff of administrators who help members get the most out of the website by means of administrative comments like this one.

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

 
[+][-]09.08.2008 at 04:38PM PDT, ID: 22422600

Experts Exchange has a courteous staff of administrators who help members get the most out of the website by means of administrative comments like this one.

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

 
 
Loading Advertisement...
20081112-EE-VQP-42