mysql - 创建引用元值的 sql 查询

Question

希望对sql查询有所帮助。我有以下内容：

$sql = "SELECT * from 
(SELECT m1.post_id as ID,post_date,m1.meta_value as project_name, m2.meta_value as access_key, m3.meta_value as seq_number
 FROM wpha_posts
 join wpha_postmeta m1 on m1.post_id = ID and m1.meta_key = '_field_5'
 join wpha_postmeta m2 on m2.post_id = ID and m2.meta_key = '_field_7'
join wpha_postmeta m3 on m3.post_id = ID and m3.meta_key = '_seq_num'
 where post_type = 'nf_sub' AND post_author = ".$profile_id." AND wpha_postmeta.seq_number = ".$seqNumber.") as v1";

$results = $wpdb->get_results($sql);

我想要做的是显示来自两个 sql 表的数据，但只显示序列号与我通过 url 传递的数字匹配的结果。

$seqNumber = (int)$_GET['id'];

我无法匹配数据库中 _seq_num 元键的元值。

任何帮助将非常感激