mysql - SQL 合并具有相同通配符值的记录

Question

我有一个 MySQL Wordpress 数据库，我正在处理结构不太好的 postmeta 表。它有四列:“meta_id、post_id、meta_key、meta_value”。这是我正在处理的查询:

SELECT  DISTINCT * 
        FROM wp_10_postmeta as pm
        JOIN wp_10_posts AS p ON pm.post_id = p.ID
        WHERE (meta_key LIKE 'personnel_%_last_name' OR
                meta_key LIKE 'personnel_%_first_name' OR
                meta_key LIKE 'personnel_%_title' OR
                meta_key LIKE 'personnel_%_alias' OR
                meta_key LIKE 'webpages_%_title' OR
                meta_key LIKE 'webpages_%_alias' OR
                meta_key LIKE 'departments_%_name' OR
                meta_key LIKE 'departments_%_alias')
            AND post_status = 'publish' AND meta_value LIKE '%john%' AND meta_value LIKE '%smith%'

问题:如果我搜索“john”或“Smith”，此查询效果很好，但如果我搜索“John Smith”，它会返回空。有没有办法将“personnel_%_last_name”和“personnel_%_first_name”组合起来然后进行比较？

Answer 1

我猜您想跨多个字段查找匹配项。尝试使用 group by 来实现此目的:

    SELECT p.*
    FROM wp_10_postmeta as pm JOIN
         wp_10_posts AS p
         ON pm.post_id = p.ID
    WHERE (meta_key LIKE 'personnel_%_last_name' OR
            meta_key LIKE 'personnel_%_first_name' OR
            meta_key LIKE 'personnel_%_title' OR
            meta_key LIKE 'personnel_%_alias' OR
            meta_key LIKE 'webpages_%_title' OR
            meta_key LIKE 'webpages_%_alias' OR
            meta_key LIKE 'departments_%_name' OR
            meta_key LIKE 'departments_%_alias')
        AND p.post_status = 'publish'
    GROUP BY p.id
    HAVING SUM(meta_value LIKE '%john%') > 0 AND SUM(meta_value LIKE '%smith%') > 0;