需要帮助将此查询转换为 NHibernate 标准

Question

有人可以帮我把这个查询翻译成 NHibernate Criteria 吗？还是标准不适合这个？

查询：

SELECT b.*
 FROM Bookmarks b
 JOIN (SELECT tg.BookmarkId
        FROM TagsBookmarks tg
        JOIN Tags t ON t.id = tg.TagId
        WHERE t.Title IN ('c#','tutorials')
      GROUP BY tg.BookmarkId
        HAVING COUNT(DISTINCT t.Title) = 2) x ON x.BookmarkId = b.Id

Answer 1

Hibernate 不允许在 from 子句中使用子查询。你可以改用in 重写它：

SELECT b.*
FROM Bookmarks b
where b.id in (SELECT tg.BookmarkId
               FROM TagsBookmarks tg JOIN
                    Tags t
                    ON t.id = tg.TagId
               WHERE t.Title IN ('c#','tutorials')
               GROUP BY tg.BookmarkId
               HAVING COUNT(DISTINCT t.Title) = 2
              )