需要對T-SQL

樹型表的查詢我有3個表即是這樣的關係：需要對T-SQL

樹被加入本身使用的ParentId爲外鍵。樹和所有者表通過xrefOwnerTree表具有多對多關係。

我想寫一個查詢/函數，我給它一個樹ID，它給了我一個最近在層次結構（向上）的OwnerId。

這是我到目前爲止有：

WITH c (TreeId, Parentid, level, BranchName, OwnerId) as 
(
    SELECT t.TreeId, t.Parentid, 0 as level, BranchName, o.OwnerId 
    FROM Tree t 
    JOIN xrefOwnerTree ot ON t.TreeID = ot.TreeId 
    JOIN Owner o ON ot.OwnerId = o.OwnerId 
    WHERE Parentid is null 

    UNION ALL 

    SELECT t2.TreeId, t2.parentid, c.level + 1, t2.BranchName, o2.OwnerId 
    FROM Tree t2 
    JOIN xrefOwnerTree ot2 ON t2.TreeID = ot2.TreeId 
    JOIN Owner o2 ON ot2.OwnerId = o2.OwnerId 
    INNER JOIN c ON c.TreeId = t2.parentid 
) 
SELECT * FROM t WHERE t.TreeId = 32800 and t.OwnerId is not NULL

它返回0的記錄。它應該返回回1.

樣本數據：

select * from tree where treeid = 32800 
union 
select * from tree where treeid = 32646 
union 
select * from tree where treeid = 32645 
union 
select * from tree where treeid = 32619 
union 
select * from tree where treeid = 31459 
union 
select * from tree where treeid = 31458

select * from owner

select * from dbo.xrefOwnerTree where treeid = 31459

WITH c (TreeId, Parentid, level, BranchName, OwnerId) as 
(
    SELECT t.TreeId, t.Parentid, 0 as level, BranchName, o.OwnerId 
    FROM Tree t 
    JOIN xrefOwnerTree ot ON t.TreeID = ot.TreeId 
    JOIN Owner o ON ot.OwnerId = o.OwnerId 
    WHERE Parentid is null 

    UNION ALL 

    SELECT t2.TreeId, t2.parentid, c.level + 1, t2.BranchName, o2.OwnerId 
    FROM Tree t2 
    JOIN xrefOwnerTree ot2 ON t2.TreeID = ot2.TreeId 
    JOIN Owner o2 ON ot2.OwnerId = o2.OwnerId 
    INNER JOIN c ON c.TreeId = t2.parentid 
) 
SELECT * FROM c

SELECT t.TreeId, t.Parentid, 0 as level, BranchName, o.OwnerId 
FROM Tree t 
JOIN xrefOwnerTree ot ON t.TreeID = ot.TreeId 
JOIN Owner o ON ot.OwnerId = o.OwnerId 
WHERE Parentid is null

來源

2016-07-27 Gerson

您可能想要更改錨定成員，使其不使用't'作爲別名，因爲它已經是CTE的名稱。如果從最終的'SELECT'中刪除'WHERE'子句，你會得到什麼？如果您只是執行CTE的主播成員，您會得到什麼？你可以發佈一小組示例數據來說明問題嗎？請閱讀[this]（http://spaghettidba.com/2015/04/24/how-to-post-a-t-sql-question-on-a-public-forum/）瞭解一些關於改善問題的提示。 – HABO

別名已更改。當我刪除where子句時，它什麼也不給我。 – Gerson

我沒有自己的表。我建議你有一個像這樣的檢查您的聯盟之一：

首先檢查它：

SELECT t.TreeId, t.Parentid, 0 as level, BranchName, o.OwnerId 
    FROM Tree t 
    JOIN xrefOwnerTree ot ON t.TreeID = ot.TreeId 
    JOIN Owner o ON ot.OwnerId = o.OwnerId 
    WHERE Parentid = 0

然後第二個..

希望它可以幫助。

來源

2016-07-27 02:27:49

當我運行第一個查詢時，我一無所獲（請參閱更新中的示例數據）。我無法孤立地運行第二個，因爲它依賴於「with」語句 – Gerson

耶看到它，你想要什麼結果爲特定的第一個查詢？ –

需要對T-SQL

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