Multiple queries in PHP

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Hi all,

I've run into a bit of a problem. I put together a query using mysql
variables in the form set @m:= 0; with the select that uses it directly
after. For any wondering, the select was using it as an incremental
value which can't be hard coded, as the value will depend on the
ordering of the results of the query itself.

The problem seems to be that while phpMyAdmin would execute this double
query perfectly well, php using mysql_query() was having problems, as
apparently it can't actually run multiple queries.

Now the full query looks something like this:


mysql_query("SELECT @m:=0;");

$query = "SELECT * FROM(
		SELECT profiles.id, ROUND(AVG(rated.score)) AS `rating`,
COUNT(rated.score) AS `total`, @m:=@m+1 AS rank FROM `rated` LEFT JOIN
`profiles` ON (profiles.id = rated.profile_id) GROUP BY rated.profile_id
ORDER BY rating DESC, total DESC) AS ranking WHERE ranking.id=$id";
$result = mysql_query($query);


which seems to be working OK so far, but does anyone know of any
potential pitfalls I might face when doing something like this?

Thanks,


Ash
www.ashleysheridan.co.uk


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