好不容易把sql语句写出来，不知道用hibernate的hql语句怎么写
"select * from homework where studentcontent is null and title not in(select title from homework where studentid="+id+")";
在这里卡住了，转成hql不知道怎么写。
而直接用sql的话却出现：
No Dialect mapping for JDBC type: -1
No Dialect mapping for JDBC type: -1; nested exception is org.hibernate.MappingException: No Dialect mapping for JDBC type: -1
深夜了，早上起来解决问题。
[解决办法]
select * from homework where studentcontent is null and title not in(select title from homework where studentid="+id+")和这个sql差不多啊，另外你sql语言这么写就行了吧：
select * from homework where studentcontent is null and studentid not like "+id+";你那个title not in (select title from homework where studentid="+id+")不就是找到studentid not like "id"的条件嘛。。。
