Mysql GROUP BY具有MAX（DATE）和MIN（DATE）

Question

在我的mysql表中，我有一个日期列和一个票证列：

+------------+------------+
| Ticket     | Date       |
+------------+------------+
| 1          | 2020-02-02 |
| 1          | 2020-03-03 |
| 1          | 2020-04-02 |
| 2          | 2020-04-05 |
| 2          | 2020-04-09 |
| 2          | 2020-04-15 |
+------------+------------+

如何用一个查询为每个票证选择最小（DATE）和最大（DATE），结果应该是：

+------------+------------+------------+
| Ticket     | MIN Date   | MAX DATE   |
+------------+------------+------------+
| 1          | 2020-02-02 | 2020-04-02 |
| 2          | 2020-04-05 | 2020-04-15 |
+------------+------------+------------+

Answer 1

这是简单的聚合：

select ticket, min(date) mindate, max(date) maxdate
from mytable
group by ticket

Answer 2

尝试此

select ticket, date
from table name
where (ticket in (select max(date)
                  from table name)
       UNION
       ticket = (select min(date)
                 from table name))