hibernate hql(多对多 子查询)
现在有两张表,文章(Article)和目录(Category).
找出某些个目录中的所有文章的hql:
fromArticleasaleftjoina.categoriesascwherec.idin(:ids)
找出某些目录中但不属于指定目录(id=xxx)的hql:
fromArticleawhereain(selectelements(c.articles)fromCategorycwherec.idin(:ids))andanotin(selectelements(c.articles)fromCategorycwherec.id=xxx)
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