需要標準以下查詢

Question

SELECT * FROM [ScoreVersion] sv WHERE [Version_No] in (SELECT max([Version_No]) 

FROM [ScoreVersion] GROUP BY [score_id] HAVING [score_id] = SV [score_id]）

Answer 1

你可以寫一個DetachedCriteria讓你的score_id, max(version_no)對的列表和與您的外部Criteria做一個多屬性IN()。

DetachedCriteria subQuery = DetachedCriteria.forClass(ScoreVersion.class); 
subQuery.setProjection(
     Projections.projectionList() 
     .add(Projections.groupProperty("scoreId")) 
     .add(Projections.max("versionNumber") 
    ) 
); 

Criteria criteria = this.getSession().createCriteria(ScoreVersion.class); 
criteria.add(
    Subqueries.propertiesIn(new String[] {"scoreId", "versionNumber"}, subQuery) 
); 

蓋下產生的SQL應該是這個樣子：

select * from [ScoreVersion] where ([score_id], [Version_No]) in (
    select [score_id], max([Version_No]) from [ScoreVersion] group by [score_id] 
); 

此前休眠4：

你不得不編寫查詢在HQL：

Query query = session.createQuery(String sql); 

其中您的查詢是：

select sv from ScoreVersion sv 
where (sv.scoreId, sv.versionNumber) in (
    select sub.scoreId, max(sub.versionNumber) 
    from ScoreVersion sub 
    group by sub.scoreId 
)