因此，经过几次尝试，我设法改变了可变产品的价格。如果有人需要发送我的代码：

UPDATE wp_postmeta
LEFT JOIN wp_posts ON wp_posts.id = wp_postmeta.post_id
LEFT JOIN wp_term_relationships ON wp_posts.post_parent = wp_term_relationships.object_id
SET
  wp_postmeta.meta_value = wp_postmeta.meta_value*1.05
WHERE wp_posts.post_type = \'product_variation\'
    AND wp_postmeta.meta_key = \'_regular_price\'
    AND wp_term_relationships.term_taxonomy_id = \'2396\'