Join with Three Tables

Posted by John on Stack Overflow See other posts from Stack Overflow or by John
Published on 2010-05-17T22:21:30Z Indexed on 2010/05/17 22:50 UTC
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Hello,

In MySQL, I am using the following three tables (their fields are listed after their titles):

comment:

commentid loginid submissionid comment datecommented

login:

loginid username password email actcode disabled activated created points

submission:

submissionid loginid title url displayurl datesubmitted

I would like to display "datecommented" and "comment" for a given "username," where "username" equals a variable called $profile. I would also like to make the "comment" a hyperlink to http://www...com/.../comments/index.php?submission='.$rowc["title"].'&submissionid='.$rowc["submissionid"].'&url='.$rowc["url"].'&countcomments='.$rowc["countComments"].'&submittor='.$rowc["username"].'&submissiondate='.$rowc["datesubmitted"].'&dispurl='.$rowc["displayurl"].' where countComments equals COUNT(c.commentid) and $rowc is part of the query listed below.

I tried using the code below to do what I want, but it didn't work. How could I change it to make it do what I want?

Thanks in advance,

John

$sqlStrc = "SELECT 
                s.loginid
                ,s.title
                ,s.url
                ,s.displayurl
                ,s.datesubmitted
                ,l.username
                ,l.loginid
                ,s.title
                ,s.submissionid
                ,c.comment
                ,c.datecommented
                ,COUNT(c.commentid) countComments
             FROM 
                 submission s
            INNER
             JOIN
                 login l
               ON
                s.loginid = l.loginid
             LEFT OUTER
             JOIN
                 comment c
               ON
                 c.loginid = l.loginid
            WHERE l.username = '$profile'    
            GROUP
               BY
                 c.loginid
            ORDER  
               BY 
                 s.datecommented DESC
            LIMIT 
                 10";       


  $resultc = mysql_query($sqlStrc);

$arrc = array(); 
echo "<table class=\"samplesrec1c\">";
while ($rowc = mysql_fetch_array($resultc)) { 
    $dtc = new DateTime($rowc["datecommented"], $tzFromc); 
    $dtc->setTimezone($tzToc);
    echo '<tr>';
    echo '<td class="sitename3c">'.$dtc->format('F j, Y &\nb\sp &\nb\sp g:i a').'</a></td>'; 
    echo '<td class="sitename1c"><a href="http://www...com/.../comments/index.php?submission='.$rowc["title"].'&submissionid='.$rowc["submissionid"].'&url='.$rowc["url"].'&countcomments='.$rowc["countComments"].'&submittor='.$rowc["username"].'&submissiondate='.$rowc["datesubmitted"].'&dispurl='.$rowc["displayurl"].'">'.stripslashes($rowc["comment"]).'</a></td>';
    echo '</tr>';
    }
echo "</table>";

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