Mysql query across tables

Question

I have a table wp_views , with columns postid and views I want to get the IDs that have the highest values of views (top 4) Then return the title and link from wp_posts using the postid .

What's the right way of doing this?

Answer 1

You can try the following

global $wpdb;
$top4=$wpdb->get_results('SELECT post_title, post_name from `'.$wpdb->prefix.'views`       
INNER JOIN `'.$wpdb->prefix.'posts` ON `postid`=`ID` 
ORDER BY `views` DESC 
LIMIT 4;', ARRAY_A);

Answer 2

I have tried to replicate your table structure from what your write and from this i have come up with the following:

SELECT id, title, link
FROM wp_views RIGHT JOIN wp_posts ON wp_posts.id = wp_views.post_id
ORDER BY views DESC
LIMIT 4;

you can try it out here: http://sqlfiddle.com/#!9/1cea23/1

I am using RIGHT JOIN to allow null values in the wp_posts part of the result. If you want to avoid NULL values in your results you can use INNER JOIN instead.