vb.org Archive - MySQL problem: select a user where membergroupids = 5,7

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- - MySQL problem: select a user where membergroupids = 5,7 (https://vborg.vbsupport.ru/showthread.php?t=168950)

Yurimien

01-28-2008 10:03 AM

MySQL problem: select a user where membergroupids = 5,7

I want to select a list of users that have a certain membergroupid

Code:

SELECT username

FROM vb_user

WHERE membergroupids = '9'

LIMIT 0 , 30

The code works when the user only has one additional group assigned, but most of my users have 5 groups assigned. The content in the database looks like: 5,7,9,10
So how can I make sure I also select those with multiple usergroups?

--------------- Added [DATE]1201523929[/DATE] at [TIME]1201523929[/TIME] ---------------
@the one that posted a reply earlier:
This selects it only if the membergroupids start with 5. But it helped me, I've added everyone to the registered members group, and expanded it to
WHERE membergroupids IN (2 , 5 , 7 )

Thank you.

Eikinskjaldi

01-28-2008 10:51 PM

That still isn't going to help you when the membergroupids is more than one. The mysql function you want is find_in_set

[mysql]
select username from user where find_in_set('9',membergroupids)
[/mysql]

The main issue is this query is in no way optimised to use indices, and will do a full table scan.

petteyg359

01-29-2008 01:53 AM

What is the difference between find_in_set and this:

Code:

SELECT username

FROM vb_user

WHERE membergroupids LIKE '%9%'

LIMIT 0, 30

MoT3rror

01-29-2008 02:04 AM

You are going to get 29, 92, etc.

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