Hibernate Group by Criteria Object

Question

I would like to implement the following SQL query with Hibernate Criteria:

SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_n         


        

Answer 1

If you have to do group by using hibernate criteria use projections.groupPropery like the following,

@Autowired
private SessionFactory sessionFactory;
Criteria crit = sessionFactory.getCurrentSession().createCriteria(studentModel.class);
crit.setProjection(Projections.projectionList()
            .add(Projections.groupProperty("studentName").as("name"))
List result = crit.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP).list(); 
return result;