How do I select a unique ID number? PHP

Posted on 2011-02-16
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";
Question by:anotherdotcommer
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.

Author Comment

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?

Expert Comment

ID: 34909303
Run this on mysql :)

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


RENAME TABLE users2 TO users;

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LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34910831

Author Comment

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

Accepted Solution

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;


SELECT * FROM users GROUP BY username;

Author Closing Comment

ID: 34919355

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