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How do I change the last line to order by rand? Now it's sorting by date of my woocommerce products.

INNER JOIN $wpdb->postmeta AS mt1 ON (posts.ID = mt1.post_id)
    WHERE
        posts.post_status = 'publish'
        AND  (mt1.meta_key = '_sale_price_dates_to' AND mt1.meta_value >= ".time().")

        GROUP BY posts.ID
        **ORDER BY posts.post_date DESC";**
  • How are you making use of this SQL query? That's a very expensive query, but it can be done with WP_Query. Also note that ordering things randomly in an SQL query is hideously expensive. It has to create a brand new table in memory with the same rows but randomly ordered before it can even begin searching – Tom J Nowell May 24 at 22:07
2

You can use ORDER BY rand(), but it's a very heavy query as a temporary table is created for it.

A WC_Product_Query or a WP_Query could be a good alternative to WPDB custom query. Both support 'orderby' => 'rand',

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