Question

我试图使用内部连接的hibernate查询语言在mySQL数据库中找到Date列的最大值

@Query("select u, CAST(MAX(o.last_modified AS DATE)) from com.dw.model.user.User as u left join com.dw.domain.order.Order as o on u.username=o.techid group by o.techid")
List<User> findUsers();

我收到此错误： -

expecting CLOSE, found 'AS' near line 1, column 36 [select u，CAST（MAX（o.last_modified AS DATE））来自com.dw.model.user.User，因为你离开加入com.dw.domain.order.Order作为o on u .username = o.techid group by o.techid]

有人可以通过告诉我如何在Hibernate中写这个来帮助我吗？

Answer 1

查询的几个问题。

1）表格别名u正在select。因为，你是按照o.techid分组的，我假设你需要select。如果您需要u中的某些列，请在select和group by这些列中明确指定。

2）CAST(MAX(o.last_modified AS DATE))应该是CAST(MAX(o.last_modified) AS DATE)

select o.techid, CAST(MAX(o.last_modified) AS DATE) 
from com.dw.model.user.User as u 
left join com.dw.domain.order.Order as o on u.username=o.techid 
group by o.techid

使用带内连接的HQL的Date列的MAX

1 个答案: