Java 请求JPA并注明日期和加入
我有两张桌子：人和入口Java 请求JPA并注明日期和加入,java,hibernate,jpa,Java,Hibernate,Jpa,我有两张桌子：人和入口 [man] +------+-------+ | id | name | +------+-------+ | 1 | man1 | | 2 | man2 | +------+-------+ [Entrance] +------+--------------------------+-------+ | id | date | idman | +------+-------------------
[man]
+------+-------+
| id | name |
+------+-------+
| 1 | man1 |
| 2 | man2 |
+------+-------+
[Entrance]
+------+--------------------------+-------+
| id | date | idman |
+------+--------------------------+-------+
| 1 | 2008-10-29 14:56:59 | 1 |
| 2 | 2008-10-29 14:56:59 | 2 |
| 3 | 2008-10-29 17:56:59 | 2 |
| 4 | 2008-10-30 14:56:59 | 2 |
+------+--------------------------+-------+
[result]
+----------------+-------+
| count entrance | name |
+----------------+-------+
| 1 | man1 |
| 2 | man2 |
+----------------+-------+
谢谢你的帮助。这是你所期待的吗
SELECT max(t1.count_by_id), m.name, FROM (
SELECT id, cast(date as date) as cdate, count(*) as count_by_id
FROM entrance
GROUP BY cdate, id) as t1
INNER JOIN man m ON (t1.id = m.id)
GROUP BY t1.id;
创建两个实体
Manentryentry