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SELECT t1.ID, t1.post_title, t1.post_date, t1.post_content, t3.display_name FROM wp_posts t1, wp_post2cat t2, wp_users t3 WHERE t1.ID=t2.post_id AND t1.post_status = 'publish' AND t1.ID != 644 AND t2.category_id IN () AND t2.category_id NOT IN (-9999) AND t1.post_author = t3.ID ORDER BY rand() LIMIT 3