Question

select count(*) from [User] u where u.username = :username 这句hql语句有错吗？

是不是关键字User加括号不能在hql中用？，怎么解决呢？

Answer 1

hql不多懂、但是貌似是不加括号的；
from User user where user name=:customername

select count(user),user age from User user group by user age having count(user)>10