hibernate many to many查询
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原文地址:http://topic.csdn.net/u/20100524/11/07083ba1-ddeb-44ce-985e-c8991e3c7b6a.html
三个table
1. User
2. Role
3. User_Role
Role对象里面有个many-to-many的关系 Set <User>
需求:查询所有 传进来一个 user 然后查出 与他关联的 List<Role>
hibernate hql 查询如何实现?
1. User
2. Role
3. User_Role
Role对象里面有个many-to-many的关系 Set <User>
需求:查询所有 传进来一个 user 然后查出 与他关联的 List<Role>
hibernate hql 查询如何实现?
4楼:
select a from User_Role a left join a.User b where b.user_id=userId
7楼:
select * from Role where (from User where id=" + value + ") in elements(users)
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