SQL使用来自子查询中的连接表

Question

我正在编写一个用作数据库视图的查询，现在看起来像这样

SELECT
  contact.*,    
  contact_users.names AS user_names,
  contact_status.status_id AS status_id,
  status_translation.name AS status_name,
  status_translation.lang_id AS lang_id
FROM contacts as contact
LEFT JOIN contact_status AS contact_status ON contact_status.status_id = contact.status
LEFT JOIN contact_status_translation AS status_translation ON status_translation.id = contact.status
LEFT JOIN (
    SELECT
    contacts_users.contact_id,
      string_agg(users.fullname || ', ' || users.id, ' | ') as names  
  FROM v_contacts_users as contacts_users
  LEFT JOIN v_users as users on users.id = contacts_users.user_id
  WHERE users.lang_id = status_translation.lang_id
    GROUP BY contacts_users.contact_id
) AS contact_users ON contact_users.contact_id = contact.id  
WHERE contact.deleted = FALSE

除了上一个WHERE中的LEFT JOIN条件之外，所有内容都按预期工作 - WHERE users.lang_id = status_translation.lang_id部分表示在此部分查询中无法引用status_translation？这是为什么？我尝试用各种各样的方式引用这个表，但结果仍然是相同的.Thing是v_users被翻译，所以我只需要从这个表中得到一个结果。感谢任何提示

Answer 1

如果您想引用之前的LATERAL列表条目，请在LEFT JOIN和左括号之间插入FROM。