Truy vấn 1 lúc nhiều điều kiện với meta_key và meta_value trong WordPress

Query_More_metakey.sql

SELECT SQL_CALC_FOUND_ROWS  wp_posts.ID 
FROM wp_posts  
INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )  
INNER JOIN wp_postmeta AS mt1 ON ( wp_posts.ID = mt1.post_id )  
INNER JOIN wp_postmeta AS mt2 ON ( wp_posts.ID = mt2.post_id )  
INNER JOIN wp_postmeta AS mt3 ON ( wp_posts.ID = mt3.post_id ) 
WHERE 1=1  
AND ( 
  wp_postmeta.meta_key = 'end_date' 
  AND 
  ( 
    ( mt1.meta_key = 'tick_event' AND CAST(mt1.meta_value AS CHAR) = '1' ) 
    AND 
    ( mt2.meta_key = 'start_date' AND CAST(mt2.meta_value AS DATE) >= '2016-4-21' ) 
    AND 
    ( mt3.meta_key = 'end_date' AND CAST(mt3.meta_value AS DATE) >= '2016-4-21' )
  )
) 

AND wp_posts.post_type = 'post' 
AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private') 

GROUP BY wp_posts.ID 
ORDER BY wp_postmeta.meta_value 
DESC LIMIT 0, 3