Sql server 需要区分特定列的内部联接

我正在编写以下存储过程：

SELECT invite.sender_id,
       invite.invite_msg_text,
       invite.date_sent,
       person.name_first,
       person.name_last,
       member.member_image_url
FROM   invite
       INNER JOIN person
               ON invite.sender_id = person.person_id
       INNER JOIN member
               ON invite.sender_id = member.person_id
WHERE  invite.invite_status = 'P'
       AND invite.recipient_email = @recipientEmail
ORDER  BY invite.date_sent DESC 

但是我想返回具有不同发件人id/个人id的行。如果用户发送了多个邀请，它现在将返回重复的行。是否可以根据发件人id/个人id仅返回不同的行

SELECT invite.sender_id, invite.invite_msg_text, invite.date_sent, person_a.name_first, person_a.name_last, member.member_image_url
FROM invite
INNER JOIN (select person_id, max(name_first) as name_first,max(name_last) as name_last from person group by person_id) as person_a 
ON person_a.person_id = invite.sender_id

---

你应该完成你想要的

这将为您提供由发件人\u id.发送的最新邀请。。使用行号来确定最后发送的是哪一个

SELECT * FROM 
(
    SELECT invite.sender_id,
           invite.invite_msg_text,
           invite.date_sent,
           person.name_first,
           person.name_last,
           member.member_image_url,
           ROW_NUMBER() OVER (PARTITION BY invite.sender_id ORDER BY invite.date_sent DESC) Rn 
    FROM   invite
           INNER JOIN person
                   ON invite.sender_id = person.person_id
           INNER JOIN member
                   ON invite.sender_id = member.person_id
    WHERE  invite.invite_status = 'P'
           AND invite.recipient_email = @recipientEmail
) t
WHERE t.RN = 1
ORDER BY t.date_sent DESC 

---

你能分享邀请、个人和成员的模式吗？当然可以。您可以向查询中添加distinct。然而，我怀疑这不会得到你想要的。当您有重复项时，您希望其他列使用哪些值？敏？最大值？聚合是实现这一点的最简单方法，但并不确定您在这里要做什么。是否要发送最近的邀请？是的，最新发送的邀请将是理想的选择。当然，添加您以后的加入和分组方式，等等