期间加入我得到如下表(例如):Java的Hibernate的JPQL查询(聚合函数:计数)
+----------+----------+
| Hostname | Severity |
+----------+----------+
| host1 | high |
| host2 | medium |
| host1 | high |
| host2 | low |
| host1 | low |
| host2 | low |
| host1 | low |
| host2 | high |
| host1 | high |
| host2 | high |
+----------+----------+
是否有可能创造我JPQL查询在那里我得到以下结果:
+----------+------+--------+-----+
| Hostname | high | medium | low |
+----------+------+--------+-----+
| host1 | 3 | 0 | 2 |
| host2 | 2 | 1 | 2 |
+----------+------+--------+-----+
我试着用COUNT
和GROUP BY
但我得到了这样的事情:
host1,high,3
host1,medium,0
host1,low,2
等等
BR,刘若英
你使用了什么查询? –