Query MySQL per elencare tutti i Prodotti semplici :
SELECT
posts.ID,
posts.post_title,
posts.post_author,
posts.post_date,
posts.post_date_gmt,
posts.post_content,
posts.post_excerpt,
posts.post_status,
posts.comment_status,
posts.ping_status,
posts.post_password,
posts.post_name,
posts.to_ping,
posts.pinged,
posts.post_modified,
posts.post_modified_gmt,
posts.post_content_filtered,
posts.post_parent,
posts.guid,
posts.menu_order,
posts.post_type,
posts.post_mime_type,
posts.comment_count
FROM
wp_posts AS posts
INNER JOIN wp_term_relationships AS term_relationships ON posts.ID = term_relationships.object_id
INNER JOIN wp_term_taxonomy AS term_taxonomy ON term_relationships.term_taxonomy_id = term_taxonomy.term_taxonomy_id
INNER JOIN wp_terms AS terms ON term_taxonomy.term_id = terms.term_id
WHERE
term_taxonomy.taxonomy = 'product_type'
AND terms.slug = 'simple'
AND posts.post_type = 'product';
Sostituisci semplicemente simple
da AND terms.slug = 'simple'
riga con variable
per ottenere tutti i Prodotti variabili;
Ho testato questa query SQL e sta visualizzando il risultato corretto.
Spero che questo aiuti!