SQL - 显示基于日期字段的描述性字段

Question

我在 Access 中有 2 个表：

表 1 有 id、first_name 和 last_name
表2有city、date_recorded和person_id

我正在尝试运行查询以显示最早日期的名字、姓氏和城市。

我可以通过以下查询来解决这个问题，但是当我尝试将城市添加到结果中时会显示所有记录。
如何将城市添加到结果中，但每人仍然只有 1 行？

SELECT table1.first_name, table1.last_name, Min(table2.date_recorded) AS First_Occurrence
FROM table1 INNER JOIN table2 ON table1.id = table2.person_id
GROUP BY table1.first_name, table1.last_name
ORDER BY Min(table2.date_recorded);

Answer 1

您可以使用子查询为具有最少 date_recorded 的人选择城市，如下所示。

  select id, first_name,last_name, First_Occurrence , (select city from table2 where person_id=t.id and date_recorded=first_occurrence ) as city 
from
(
    SELECT t1.id, t1.first_name, t1.last_name, min(t2.date_recorded) AS First_Occurrence
    FROM table1 as t1 INNER JOIN table2 as t2 ON t1.id = t2.person_id
    GROUP BY  t1.id,t1.first_name, t1.last_name
    order by min(t2.date_recorded) 
) t