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如何在HQL中编写"不存在"查询？我试图获得一个HQL不存在的查询,它返回与此Oracle SQL查询相同的结果:

select *
from SCHOOL a
where not exists (select 1
from STUDENT b
where B.SCHOOL_ID=a.id
and B.STATUS_ID not in (0,1,2,3,4))

我的映射文件如下:

  <!-- primary key ommitted -->
<set name="students"
     cascade="all" fetch="select" lazy="false" >
    <key column="SCHOOL_ID" />
    <one-to-many class="com.companyname.Student" />
</set>
</class>

  <!-- primary key ommitted -->
 <many-to-one name="school" 
              column="SCHOOL_ID"
              class="com.companyname.School" fetch="join" lazy="false"/>

 <many-to-one name="status"
        class="com.companyname.Status" column="STATUS_ID" />
</class>

我在School.hbm.xml文件中尝试了以下标记

<query name="myQuery">
    <![CDATA[
    from School s where not exists from Student st
    where st.school_id=s.id and st.status.id not in (0,1,2,3,4)
    ]]> …

我在哪里可以找到所有HQL关键字的列表？