Mark wrote:
Dear MySQL-ers,
Using MySQL 4.1.20, I'm trying to do a complex query on a subset; well,
complex to me, that is. :)
In Perl, I'm trying to get 4 random entries from a subset "WHERE processed
= '1'" and "columnId" is unique. Like so:
$sth = $dbh->prepare ("SELECT columnId FROM queue WHERE columnId >=
(SELECT FLOOR(MAX(columnId) * RAND()) FROM queue) IN (SELECT columnId FROM
queue WHERE processed = '1') ORDER BY columnId LIMIT 4");
I'm not even sure what you're trying to get here!
Could you provide some sample data (5 rows) and what you want the query
to return?
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