0
如果我运行下面的查询,我感到我不能投龙选择多个和HQL
String queryString = "select sum(cat.varaible1), sum(cat.varaible2) from Enrollment as cat where cat.created >= :startDate and cat.created <= :endDate";
如果我删除总和(cat.varaible2)对象的列表,然后我得到含长值的列表背部。
String queryString = "select sum(cat.varaible1) from Cat as cat where cat.created >= :startDate and cat.created <= :endDate";
这是怎么发生的?请解释