Question

我希望得到我所有类别的所有孩子并与内容合并。我希望当我点击一个类别时，显示所有类别和子类别的内容。我使用CTE，它是：

WITH ret AS (SELECT     id, parent
                         FROM        ContentsGroups
                         WHERE     (id = @id)
                         UNION ALL
                         SELECT     t.id, t.parent
                         FROM         ContentsGroups AS t INNER JOIN
                                               ret AS r ON t.parent = r.id)
SELECT     id
 FROM         ret

如何将输出连接到我的目录表？

当我使用这些时：

SELECT title FROM Contents WHERE id IN (WITH ret AS ... )

我得到与条款有关的错误我如何与我的表合并条款？感谢

Answer 1

试试这个

WITH ret AS (SELECT     id, parent
                         FROM        ContentsGroups
                         WHERE     (id = @id)
                         UNION ALL
                         SELECT     t.id, t.parent
                         FROM         ContentsGroups AS t INNER JOIN
                                               ret AS r ON t.parent = r.id)

SELECT title FROM Contents WHERE id IN (SELECT id FROM ret);

如何将CTE用于IN子句？

1 个答案: