Question

我想使用hibernate从表中删除记录列表：

我的SQL查询看起来像：

delete from students where joinDate="2014-03-08"

我想删除在上述日期加入的所有记录。

在学生表中，我有两个外键：classId和courseId。

您能否帮助如何为上述场景编写有效的hibernate删除查询方式？

感谢您的帮助！

Answer 1

最简单的方法是从每个表中单独删除：

-- Remove all connections from A which reference
-- the B-rows you want to remove
DELETE FROM A_has_B
WHERE B_id IN (1,2);

-- Remove all connections from C which reference
-- the B-rows you want to remove
DELETE FROM C_has_B
WHERE B_id IN (1,2);

-- Finally remove the B-rows
DELETE FROM B
WHERE B_id IN (1,2);

Answer 2

您可以使用HQL删除多条记录，如下所示：

Transaction transaction = session.beginTransaction();
try {
  // your code
  String hql = "delete from students where joinDate= :joinDate";
  Query query = session.createQuery(hql);
  System.out.println(user.getUid() + " and pid: " + pid);
  query.setDate("joinDate", student.getJoinDate());
  System.out.println(query.executeUpdate());
  // your code end

  transaction.commit();
} catch (Throwable t) {
  transaction.rollback();
  throw t;
}

除此之外，您可以使用session.delete(student);方法删除记录

Answer 3

试试这个。 Refer

Hibernate HQL delete with and

      String deleteQuery = "delete from students where joinDate= :joinDate";
      Query query = session.createQuery(deleteQuery);
      query.setString("joinDate", "2014-03-08"); //convert date from string
      query.executeUpdate()

正确地在查询中传递加入日期。我假设join date数据类型是字符串。如果使用SimpleDateFormat将日期转换日期字符串连接到java.util.date，则传递参数。 string to date conversion

如何使用hibernate java中的where条件删除多条记录

3 个答案: