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POReturning multiple rows per row (in Zend Framework)
 

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    <p>I have a MySQL database containing these tables:</p> <pre><code>sessions -------- sessionid (INT) [courseid (INT)] [locationid (INT)] [comment (TEXT)] dates ----- dateid (INT) sessionid (INT) date (DATE) courses ------- ... locations --------- ... </code></pre> <p>Each session has a unique sessionid, and each date has a unique dateid. But dates don't necessarily have a unique sessionid, as a session can span over a variable number of dates (not necessarily consecutive).</p> <p>Selecting each full row is simply a matter of joining the tables on the sessionid. However, I'm looking for a way to return a rowset for a particular courseid, where each row in that rowset represents a location, and contains another rowset, each containing single session, which in turn contains another rowset, which contains all of the dates for that session:</p> <pre><code>course location sesssion date date session date date date location ... </code></pre> <p>This is because I'm using querying this database from PHP using Zend Framework, which has a great interface for manipulating rows and rowsets in an object-oriented manner.</p> <p>Ultimately, I'm trying to output a 'schedule' to the view, organized first by course, then location, then date. Ideally, I'd be able iterate over each row as a location, and then for each location, iterate over each session, and then for each session, iterate over each date.</p> <p>I'm thinking of doing this by querying for all the locations, sessions, and dates separately. Then, I'd convert each rowset into an array, and add each sessions array as a member of a locations array, and add each dates array as a member of a sessions array.</p> <p>This, however, feels very kludgy, and doesn't provide me with the ability to handle the rows in an object-oriented manner.</p> <p>I was wondering if there was either:</p> <p>a) a better table schema for representing this data;</p> <p>b) an sql query which i'm not aware of;</p> <p>c) a method in Zend_Db that allows me to assign a rowset to a rowset</p> <p>Please let me know if I haven't been clear anywhere, and thanks in advance.</p> <p>(Crossing my fingers that this doesn't end up on the daily wtf...)</p>
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