Join tables hibernate + group by

问题

I need to do this query with Java + Hibernate.

SELECT 
    table2.id,
    COUNT(table2.id) AS count
FROM
  table1 
    JOIN table2
       ON table1.fk_tb2 = table2.id  --many2one
GROUP BY
   table2.id

I would use DetachedCriteria class.....how can i do this ?

回答1:

Try using projections like this:

Criteria table1Crit = session.createCriteria("table1");
Criteria table2Crit = table1Crit.createCriteria("table2", Criteria.INNER_JOIN);
table2Crit.setProjection( Property.forName("id").count() );

回答2:

use your query with createNativeQuery method

来源：https://stackoverflow.com/questions/11146105/join-tables-hibernate-group-by