Re: QUICK HELP, two selects, maybe nested.

[Sinisa Milivojevic <sinisa@xxxxxxxxx>]

Corey Kaye writes:
> Looking though the docs. MySQL does not support nested selects but i'm looking for a way to speed up my PHP.
> 
> This is what i have:
> 
> CREATE TABLE departmentuser (
>   userid int(10) unsigned zerofill default NULL,
>   departmentid int(10) unsigned zerofill default NULL,
>   KEY userid_departmentid(userid,departmentid)
> );
> 
> What i need to do is select out of this table all the userid's that have a departmentid of 368 AND 142.
> 
> What is the best way to do this?
> 
> Currently i'm selecting all the users with 368 and running through a loop and checking to see if the returned list of userid also have 142.  This takes about 20sec as this is a BIG list !
> 
> PLEASE HELP !!!!
> 
> PS I've never done it but can  you use IF statements in MySQL ?
> 

Would this query do what you need ??

SELECT userid from departmentuser where departmentid IN (142,368);


-- 

Consider taking our support. Visit : https://order.mysql.com

Regards,
   __  ___     ___ ____  __
  /  |/  /_ __/ __/ __ \/ /    Mr. Sinisa Milivojevic <sinisa@xxxxxxxxx>
 / /|_/ / // /\ \/ /_/ / /__   MySQL AB, Fulltime Developer
/_/  /_/\_, /___/\___\_\___/   Larnaca, Cyprus
       <___/   www.mysql.com


---------------------------------------------------------------------
Before posting, please check:
   http://www.mysql.com/manual.php   (the manual)
   http://lists.mysql.com/           (the list archive)

To request this thread, e-mail <mysql-thread92831@xxxxxxxxxxxxxxx>
To unsubscribe, e-mail <mysql-unsubscribe-treed=ultraviolet.org@xxxxxxxxxxxxxxx>
Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php