在子查询中使用WITH(MS SQL)

Question

我正试图在子查询中执行一些递归,但我似乎无法使用WITH- 我是否错过了某些内容或者是否有解决方法？

WHERE swn.stocknode_id in 
(
    WITH Hierachy(stocknode_id, short_desc, PARENTNODE_ID, level)

    AS

    (
        SELECT 
            a.stocknode_id,
            0 AS level

        FROM stock_website_node AS a  

        WHERE a.short_desc = 'XXXXXXXX'
        AND a.PARENTNODE_ID = 0

        UNION ALL

        SELECT 
            a.stocknode_id,
            ch.level + 1

        FROM stock_website_node AS a

        INNER JOIN Hierachy ch
        ON a.PARENTNODE_ID = ch.stocknode_id
    )

    SELECT 
        stocknode_id

    FROM Hierachy

    WHERE level > 0
) 

我遇到了:

Incorrect syntax near the keyword 'WITH'.

Answer 1

公用表表达式必须位于顶层.

您需要从该WHERE子句中取出CTE,并且只需WHERE像这样重新引用stocknode_id :

WHERE swn.stocknode_id in (SELECT stocknode_id FROM Hierachy WHERE level > 0)