RE: [PHP] finding a particular record within a MySQL result set
| From: | Jim Moseby | Date: | Wed, 04 Apr 2007 17:35:36 +0000 |
| Subject: | RE: [PHP] finding a particular record within a MySQL result set | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-252060@lists.php.net to get a copy of this message | ||
>
> I've cross posted this to the MySQL list...
>
> Here's my original post.
>
> > Is there some quick way to do the following in MySQL? (I know I
> > can use PHP to search through the result set, but I wanted to see
> > if there's a quick way using some sort of query)
> >
> > Let's say I know that Joe is from Maine.
> > I want to do a query of all employees from Maine, ordered
> by hiring
> > date, and figure out where Joe falls in that list. (i.e. which
> > record number is he?)
> >
> > -James
> >
>
>
> Here's my new plan of attack...
>
> Right now I'm trying to use PHP to do a binary search on the result
> set so I don't have to traverse the entire result set.
>
> I'm using PHP's mysql_data_seek() to move the pointer within the
> result set and looking at the data to do the necessary comparisons.
>
> What do people think of this approach?
>
You will probably get a better approach from the mysql list, but from a PHP
solution perspective, I'd load up an array with the result set and use key()
to get the number.
The example at http://php.net/key does exactly that.
JM