一些常用的HQL写法(转)

 

 

1.hql更新
   String hql = "update PhUser set realName=?";
   int row=this.getSession().createQuery(hql).setString(0, "小李想").executeUpdate();
   PhUser 类名
2.hql删除
   String hql = "delete PhUser a where a.userId=2";
   int row=this.getSession().createQuery(hql).executeUpdate();
   还有个这种的格式:
   final String hql = "delete PhRoleFunction as a where a.roleId = "
     + roleId;
   this.getHibernateTemplate().execute(new HibernateCallback() {
    public Object doInHibernate(Session session)
      throws HibernateException, SQLException {
     return session.createQuery(hql).executeUpdate();
    }
   });更新也可以写成这样的格式
3.hql单表查询
   String hql = "from PhUser a where a.userId=" + userId;
   List list = this.getHibernateTemplate().find(hql);
4.hql多表查询
   (1)String hql = "select new map(a.CUId as CUId,a.unitName as unitName,b.CUFId as CUFId,b.UFName as UFName) from PhCorrelativeUnit a,PhCorrelativeUnitFunction b where a.CUId=b.CUId";
   List list = this.getHibernateTemplate().find(hql);
   多个表的字段放到map中,map的键值就是as后面的别名,如果没有as就是字段名
   (2) String hql = "select new com.phantom.appeal.action.bean.DealPaper(a.id as id,a.billId as billId,a.state as     state,a.creator as creator,a.createtime as createtime ,b.eventContent as eventContent ,c.realName as     realName,b.billCode as billCode,b.citName as citName ) from PhDealBill a,PhAcceptBill b,PhUser c where    a.departmentId="+ billid+ " and a.state=0 and a.billId=b.billId and a.creator =c.userId order by a.billId";
    return this.getHibernateTemplate().find(hql);
   另外就是写一个类,对应你要查询的字段,这里的类名是new com.phantom.appeal.action.bean.DealPaper,里面对应查询的字段名
5.得到记录数
   String hql = "select count(*) from PhUser";
   List list = this.getHibernateTemplate().find(hql);
   return ((Long) list.get(0)).intValue();
</SPAN>

6 In语句  效率不高,但是很实用啊

String hql = "from Errmodtb em where em.errprocessstate=3 and em.siteno in (select d.id.code from Dicinfo d where d.parentcode = '"+d.getId().getCode()+"')" ;