Join tables hibernate + group by
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16-06-2021 - |
문제
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 ?
해결책
Try using projections like this:
Criteria table1Crit = session.createCriteria("table1");
Criteria table2Crit = table1Crit.createCriteria("table2", Criteria.INNER_JOIN);
table2Crit.setProjection( Property.forName("id").count() );
다른 팁
use your query with createNativeQuery
method
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