SELECT 

    post.ID,

    post.post_title,

    post.post_date,

    post.category_name,

    post.category_slug,

    post.category_id,

    CONCAT( 'uploads','/', thumb.meta_value) as thumbnail,

    post.post_type

FROM (

    SELECT  p.ID,   

          p.post_title, 

          p.post_date,

          p.post_type,

          MAX(CASE WHEN pm.meta_key = '_thumbnail_id' then pm.meta_value ELSE NULL END) as thumbnail_id,

      term.name as category_name,

      term.slug as category_slug,

      term.term_id as category_id

    FROM wp_posts as p 

    LEFT JOIN wp_postmeta as pm ON ( pm.post_id = p.ID)

    LEFT JOIN wp_term_relationships as tr ON tr.object_id = p.ID

    LEFT JOIN wp_terms as term ON tr.term_taxonomy_id = term.term_id

    WHERE 1  AND p.post_status = 'publish'

    GROUP BY p.ID ORDER BY p.post_date DESC

  ) as post

  LEFT JOIN wp_postmeta AS thumb 

    ON thumb.meta_key = '_wp_attached_file' 

    AND thumb.post_id = post.thumbnail_id

  LIMIT 10;