Solved

How do I select a unique ID number? PHP

Posted on 2011-02-16
7
425 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
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
VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

 
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

Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

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

Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
This article discusses how to create an extensible mechanism for linked drop downs.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.

770 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