如果我有两个实体类别,即团体和个人,在团体与个人之间有一对一的关系(即一个人可以属于多数群体),一个群体可以有许多人)。

“SlectT pub JOIN pub.magazines mag WHERE pub.revenue 100”

我拥有三个模型的保密数据库:

I m目前试图用JQPL收集数据。 我的祝福

I have a JPA entity with a blob field in it. I want to write a JPQL query to fetch the length of the entity s blob (I don t want to load the blob into the memory). For instance, in Oracle, I can use ...

I m与JPA(自愿作为供应商)和MySQL数据库合作。

I have a table of Sessions. Each session has "session_start_time" and "session_end_time". While the session is open, the end time is empty. I want to fetch the list of sessions, and order it by the ...

我需要将小 result结果分配给一个简单的小 class物体。