按元键值自定义选择查询wordpress顺序

Question

我正在尝试ORDER BY自定义选择查询的结果.

但我试图通过元键的值来排序.

请在下面查看我的查询...

$get_atts =  $wpdb->get_results("SELECT ID, post_title FROM $wpdb->posts WHERE $wpdb->posts.post_type IN ('individual') ORDER BY $wpdb->posts.meta_key = 'surname' ASC");

正如你所看到的,这ORDER BY打破了......

ORDER BY $wpdb->posts.meta_key = 'surname' ASC"

所以我试图按价值排序 surname

但我似乎没有工作.可以解释为什么或帮助？

Answer 1

尝试使用此查询:

$get_atts =  $wpdb->get_results("SELECT ID, post_title FROM $wpdb->posts, $wpdb->postmeta
    WHERE $wpdb->posts.ID = $wpdb->postmeta.post_id AND $wpdb->postmeta.meta_key = 'surname' 
    AND $wpdb->posts.post_type IN ('individual') ORDER BY $wpdb->postmeta.meta_value ASC");