Database SQL order by value in column field

3 Views

I have a WordPress blog with obviously a WordPress database.

Database name: wordpress

Read More

The two tables communicating are wp_users and wp_usermeta.

The table usermeta has columns user_id, meta_key, and meta_value. 

user_id   meta_key          usermeta

1         name              mark
1         userurl           mark.com
1         points            8

2         name              luke
2         userurl           luke.com
2         points            4

2         name              frank
2         userurl           frank.com
2         points            6

I would display the data on a specific page like this and ordered by points value desc: 

Name: Mark
User Blog: mark.com
points: 8

Name: Frank
User Blog: mark.com
points: 6

Name: Luke
User Blog: luke.com
points: 4

I used a code like this but obviously wont work: 

$sql =
    "SELECT user_id, meta_key, meta_value" .
    " FROM wp_usermeta" .
    " WHERE meta_key IN ('name','userurl','points')" .
    " ORDER BY meta_value DESC";

$usermeta = $wpdb->get_results($sql);

print("<ul>");
foreach ($usermeta as $post)
{
    print('<li>' . $post->meta_value . '<br/>');
    print('</li><br><br>');
}
print("</ul>");
Post Views: 3

Related posts

Leave a Reply

3 comments

  1. you can probably do something like

    select t1.user_id, t1.meta_value, t2.meta_value, t3.meta_value
from wp_usermeta t1
inner join wp_usermeta t2 on t1.user_id = t2.user_id and t2.meta_key = 'userurl'
inner join wp_usermeta t3 on t2.user_id = t3.user_id and t3.meta_key = 'points'
where t1.meta_key = 'name'

  2. try this

         SELECT `user_id`,
     max(case when  `meta_key` = 'name' then `usermeta` end)  as name  ,
     max(case when  `meta_key` = 'userurl' then `usermeta` end) as website ,
     max(case when  `meta_key` = 'points' then `usermeta` end ) as points 
     FROM wp_usermeta
     GROUP BY `user_id`           
     ORDER BY points DESC

    DEMO HERE

    • you should structure your table like that for better and easier insert and update and select.

      user_id   name     userurl    points 
  1       mark     mark.com     8
  2       luke     luke.com     4
  3       frank    frank.com    6

    and then do this query

       select * from table order by points

    EDIT:

       $usermeta = $wpdb->get_results($sql) or die(mysql_error()) ;

 echo"<ul>";
 foreach ($usermeta as $post)
 {
 echo "<li>" . $post->name ." have ".$post->points. " Points </li><br /><br />" ;

 }
 echo "</ul>";

  3. Have you considered using 2 queries?

    First one to get the order by points, the second to get the data? Then manipulate the data from both results to create a new ordered array?

    SELECT user_id FROM wp_usermeta WHERE meta_key = 'points' ORDER BY meta_value DESC;

SELECT user_id, meta_key, meta_value WHERE meta_key IN ('name','userurl','points');