wp_db get 2 most recent items

Normally that is done by adding something like this to your query;

ORDER BY post_date DESC LIMIT 2

But, that would depend on your query and what table/tables you’re looking at. Can you show us the query that you’re working with?

Thanks.

Here’s what I’ve currently got

<?php
global $wpdb;
$heightcm = $wpdb-> get_var("SELECT height FROM group_data WHERE group_id = $group_id 

ORDER BY rowid DESC LIMIT 0,1"

);

   // Convert the height to metres and ft

   $heightm = ($tideheightcm/100);
   $heightmround = round($tideheightm,1);

   $heightft = ($tideheightm*3.281);
   $heightftround = round($tideheightft,1,PHP_ROUND_HALF_DOWN);

?>

I couldn’t get it to order by date for some reason so I’m using row_id which is auto incremented.

So what I would like to be able to do is get the two most recent heights and set them as $heightcm1 and $heightcm2

Another thing that might be really handy is to have the ‘time’ data for each row as well.

Well, what’s the date column called in that table? You’ll need to use ORDER BY with that column. Something like this… But this is with guessed column names.

SELECT
   height,
   data_date
FROM group_data
WHERE group_id = $group_id
ORDER BY data_date DESC LIMIT 2

That will get the latest two records.

but how do I then place the results into variables?

This is the basics for it…

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

foreach ($results as $row) {
    echo "<p>Row: '".$row->height."'</p>";
}

You’ll have to figure out your own styling and what you want output, but that’s how it’s done.