ordering wordpress post_meta - lowest to highest - wordpress

Question

I am currently looping through all posts and displaying a post_meta value like this:
global $wpdb;
$table = $wpdb->prefix . 'postmeta';
$theid = get_the_id();
$getLowestPrice = $wpdb->get_results("SELECT * FROM $table WHERE meta_value = '$theid'");
foreach ( $getLowestPrice as $post ){
get_post_meta( $post->post_id, '_wholesale_price', false );
}
Is there a way to order the results, lowest -> highest? At the moment they are getting displayed randomly, or as they were entered.

Answer 1

use the following code
<?php
global $wpdb;
$table = $wpdb->prefix . 'postmeta';
$theid = get_the_id();
$getLowestPrice = $wpdb->get_results("SELECT * FROM $table WHERE meta_value = '$theid'");
$all_post = array();
foreach ( $getLowestPrice as $post ){
$all_post[] = $post->post_id;
}
$query = new WP_Query( array( 'post__in' => $all_post, 'orderby' => 'meta_value', 'meta_key' => '_wholesale_price','order' => 'ASC') );
// The Loop
if ( $query->have_posts() ) {
while ( $query->have_posts() ) {
$query->the_post();
echo '<div>' . get_post_meta( $get_the_ID(), '_wholesale_price', false );() . '</div>';
}
} else {
// no posts found
}
/* Restore original Post Data */
wp_reset_postdata();
?>`

Answer 2

This looks a bit wrong to me. If you're trying to order posts by the value of a meta key (unless I'm mistaken, that is what you're doing) then I would normally go about it using WP_Query()
global $wp_query;
$args = array(
'post_type' => '[YOUR POST TYPE]',
'meta_key' => '_wholesale_price',
'orderby' => 'meta_value meta_value_num', // meta_value_num for value
'order' => 'ASC' // or DSC for low/high
);
$wp_query - new WP_Query( $args );
if ( $wp_query->have_posts() ) {
while ( $wp_query->have_posts() ) {
$wp_query->the_post();
// Your loop
}
}