Question

我遇到了MySQL查询问题。我应该按年龄选择成员使用年龄的上限和下限。例如，此查询返回一些结果

SELECT DISTINCT users.* 
FROM wp_users as users  
INNER JOIN wp_usermeta as mt 
ON (users.ID = mt.user_id) 
WHERE 1=1 
AND (
    (mt.meta_key LIKE 'user_birthday' AND mt.meta_value <> '' AND mt.meta_value <= 1985) 
    AND (mt.meta_key LIKE 'user_birthday' AND mt.meta_value <> '' AND mt.meta_value >= 1920)
) 
AND users.ID NOT IN (1,2,3) 
ORDER BY users.user_registered desc

此查询返回约70个结果。但是当我在这个查询中添加搜索名字时，就像这样：

SELECT DISTINCT users.* 
FROM wp_users as users 
INNER JOIN wp_usermeta as mt ON (users.ID = mt.user_id) 
WHERE 1=1 
AND (
    (mt.meta_key = '_upme_search_cache' AND mt.meta_value LIKE '%first_name::John%') 
    AND (mt.meta_key LIKE 'user_birthday' AND mt.meta_value <> '' AND mt.meta_value <= 1985) 
    AND (mt.meta_key LIKE 'user_birthday' AND mt.meta_value <> '' AND mt.meta_value >= 1920)
) 
AND users.ID NOT IN (1,2,3) 
ORDER BY users.user_registered desc

这会返回0结果，但我知道我在数据库中有2个Johns。

SELECT DISTINCT users.* 
FROM wp_users as users 
INNER JOIN wp_usermeta as mt ON (users.ID = mt.user_id) 
WHERE 1=1 AND (
    (mt.meta_key = '_upme_search_cache' AND mt.meta_value LIKE '%first_name::John%')
) AND users.ID NOT IN (1,2,3) 
ORDER BY users.user_registered desc

这个返回2条记录。

这里肯定没有语法错误，但我想我的逻辑在某处？

我应该提一下，这是安装了UPME插件的WordPress数据库。

我是否在加入桌子或别的东西时犯了错误？

Answer 1

这可能会有所帮助..

$args = array(                      
        'meta_query'   => array( 'meta_query' => array(
                        array(
                            'key' => '_upme_search_cache',
                            'value' => 'first_name::John',
                            'compare' => 'LIKE'
                        ),
                        array(
                            'key' => 'user_birthday',
                            'value' => '1985',
                            'compare' => '<='
                        ),
                        array(
                            'key' => 'user_birthday',
                            'value' => '1920',
                            'compare' => '>='
                        )
                    )),
        'include'      => array(),
        'exclude'      => array(1,2,3),
        'orderby'      => user_registered ,
        'order'        =>DESC                   
     );

 $users = get_users( $args );

Answer 2

问题是您要查询不在同一行中的数据（meta_key列的值不同）。您需要另一个JOIN到wp_usermeta表或一些子查询。您可以使用此小提琴作为点http://sqlfiddle.com/#!9/48836/2

的说明

向MySQL查询添加其他条件会导致空响应

2 个答案: