Question

如何使用criteria或HQL查询获取表格的第一行？

表格创建脚本

   CREATE TABLE MonthlySubscriber(MSISDN bigint(20) 
   NOT NULL, MonthOfYear int(11) NOT NULL, 
   PRIMARY KEY (MSISDN));

Answer 1

是的，您可以使用setMaxResults＆amp;标准中的setFirstResult

示例代码

Criteria queryCriteria = session.createCriteria(MonthlySubscriber.class);
queryCriteria.setFirstResult(0);
queryCriteria.setMaxResults(1);
monthlySubscriberList = queryCriteria .list();

Answer 2

你可以这样做：

Session session = getHibernateTemplate().getSessionFactory().getCurrentSession();
        String sql= "select b.wcd, a.optime from UseWaterRecord a, WellBasicInfo b where a.stcd=:a_stcd and b.stcd=:b_stcd ORDER BY a.optime desc";
        Query query = session.createQuery(sql);
        query.setString("a_stcd", "10100405");
        query.setString("b_stcd", "10100405");
        query.setFirstResult(0);
        query.setMaxResults(1);

        List wrwmList = query.list();

Answer 3

 Criteria queryCriteria = currentSession.createCriteria(Project.class);
 queryCriteria.setFirstResult(0);
 queryCriteria.setMaxResults(1);
 entity = (Project) queryCriteria.uniqueResult(); // Casting to the Entity class

Answer 4

public Criteria setFirstResult(int firstResult)

此方法采用一个整数表示结果集中的第一行，从第0行开始。REFER

按条件查询获取第一行表

4 个答案: