php – wordpress自定义查询选择元值

发布时间：2020-12-13 17:24:56 所属栏目：PHP教程来源：网络整理

导读：SELECT b.post_title,a.post_id,COUNT( * ) as TotalFROM wp_posts b INNER JOIN wp_postmeta a ON a.post_id = b.ID WHERE a.meta_value = 1 AND a.meta_key = 'type-select' AND b.post_status = 'publish' and post_type = 'car-cc'GROUP BY b.post_title

SELECT b.post_title,a.post_id,COUNT( * ) as Total
FROM  wp_posts b INNER JOIN 
            wp_postmeta a ON a.post_id = b.ID
    WHERE a.meta_value = 1
      AND a.meta_key = 'type-select' 
      AND b.post_status = 'publish'
      and post_type = 'car-cc'
GROUP BY b.post_title,a.post_id

目前它选择帖子标题和帖子ID,但我还需要选择元值,其中元键=类型 – 问题是另一个元键已经在查询中进行了比较.

SQL小提琴：http://sqlfiddle.com/#!2/109c2/1

解决方法

干得好

SELECT b.post_title,COUNT( * ) AS Total,(SELECT meta_value FROM  `wp_postmeta` WHERE post_id= b.ID AND meta_key='type-gen') AS 'new  meta value'
FROM  wp_posts b INNER JOIN 
            wp_postmeta a ON a.post_id = b.ID
    WHERE a.meta_value = 1
      AND a.meta_key = 'type-select' 
      AND b.post_status = 'publish'
      AND post_type = 'car-cc'
GROUP BY b.post_title,a.post_id

Fiddle

（编辑：李大同）

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