[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.
Question
[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!
8.7

Delete Duplicate Records in SQL Table

Asked by EMB01 in MySQL Server, Databases Miscellaneous

Tags: delete, duplicate, records, sql, table, by row

I was reading this:
http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_24717708.html?sfQueryTermInfo=1+check+duplic+tabl

But, can someone show me how to delete them without having to add an additional column to my table?  The solution above requires that I make another column to identify duplicates.  I can do this, but is there a way to remove all duplicates (while preserving the first record, of course) without adding this table?

I've attached the code from the previous solution. 
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:

DELETE FROM TABLE
WHERE [U-ID] not in
	-- Skip first record of each duplicated field and pick the rest
	(select min([U_ID]) from TABLE
	 where [Field_To_Check_For_Duplicates] in
		
		-- Pick all duplicated fields
		(SELECT [Field_To_Check_For_Duplicates]
		 FROM TABLE GROUP BY [Field_To_Check_For_Duplicates]
		 HAVING count(*) > 1
		)
	 Group by [Field_To_Check_For_Duplicates]
	 Order by [U_ID]
	)
 
AND [U_ID] IN 	(SELECT [Field_To_Check_For_Duplicates]
		 FROM TABLE GROUP BY [Field_To_Check_For_Duplicates]
		 HAVING count(*) > 1)
[+][-]11/01/09 09:13 AM, ID: 25714394Accepted Solution

View this solution now by starting your 30-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: MySQL Server, Databases Miscellaneous
Tags: delete, duplicate, records, sql, table, by row
Sign Up Now!
Solution Provided By: angelIII
Participating Experts: 3
Solution Grade: A
 
[+][-]09/28/09 08:09 AM, ID: 25439991Assisted Solution

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

Start your 30-day free trial to view this Assisted Solution or ask the Experts your question.

 
[+][-]09/28/09 09:04 AM, ID: 25440483Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]09/28/09 03:07 PM, ID: 25443870Expert Comment

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

 
[+][-]09/28/09 05:21 PM, ID: 25444810Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]09/29/09 05:25 AM, ID: 25448061Assisted Solution

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

Start your 30-day free trial to view this Assisted Solution or ask the Experts your question.

 
[+][-]10/02/09 01:20 PM, ID: 25481719Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/27/09 12:22 PM, ID: 25676336Administrative Comment

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

 
[+][-]10/27/09 04:18 PM, ID: 25678733Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-92 - Hierarchy / EE_QW_3_20080625