Solved

How do I select a unique ID number? PHP

Posted on 2011-02-16
7
429 Views
Last Modified: 2012-05-11
On my website it displays a bunch of different users. but when the user is creating an account the query messes up once in a while and inserts the information twice into the database.
So when it displays it, it displays that user twice. Is there a way to weed out duplicates in the SELECT command, when I'm running the query? I tried SELECT DISTINCT but that didn't do it... Right now it looks like this: $query = "SELECT DISTINCT user FROM users";
0
Comment
Question by:anotherdotcommer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 17

Expert Comment

by:Chris Harte
ID: 34908992
The information has been entered twice into the database. The only difference will be the key index. You will have to go into the database and delete the duplicate.
0
 

Author Comment

by:anotherdotcommer
ID: 34909015
I can't go into the database and delete the extras, there are way to many.
So there isn't a way to sort out the duplicates by the username, or another unique row?
0
 
LVL 8

Expert Comment

by:rationalboss
ID: 34909303
Run this on mysql :)

CREATE TABLE users2 as
SELECT * FROM users GROUP BY username;

DROP TABLE users;

RENAME TABLE users2 TO users;

Open in new window

0
WordPress Tutorial 4: Recommended Plugins

Now that you have WordPress installed, understand the interface, and know how to install new parts, let’s take a look at our recommended plugins.

 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34910831
0
 

Author Comment

by:anotherdotcommer
ID: 34910907
I need to do it somehow do it without deleting any of the rows..... Is there any way?
0
 
LVL 8

Accepted Solution

by:
rationalboss earned 500 total points
ID: 34912193
If you just want to list the usernames, you can use the following queries:

SELECT DISTINCT(username) FROM users;

-or-

SELECT * FROM users GROUP BY username;
0
 

Author Closing Comment

by:anotherdotcommer
ID: 34919355
Thanks!!!
0

Featured Post

Get HTML5 Certified

Want to be a web developer? You'll need to know HTML. Prepare for HTML5 certification by enrolling in July's Course of the Month! It's free for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Popularity Can Be Measured Sometimes we deal with questions of popularity, and we need a way to collect opinions from our clients.  This article shows a simple teaching example of how we might elect a favorite color by letting our clients vote for …
I imagine that there are some, like me, who require a way of getting currency exchange rates for implementation in web project from time to time, so I thought I would share a solution that I have developed for this purpose. It turns out that Yaho…
The viewer will learn how to dynamically set the form action using jQuery.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

628 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question