Teradata支持多個子句嗎？

Question

試圖在SQLAssitant（ⅴ的15.x的Teradata）來執行：

WITH TEMP1 (EMP_ID,E_NAME,E_SAL) AS (WITH TEMP (EMP_ID,E_NAME,E_SAL) AS (SELECT EMP_ID,E_NAME,E_SAL FROM EMP_TABLE_TEST) 
SELECT EMP_ID,E_NAME,E_SAL FROM TEMP) SELECT EMP_ID,E_NAME,E_SAL FROM TEMP1 

錯誤：SELECT失敗。 6926：定義，視圖，觸發器或存儲過程

WITH TEMP (EMP_ID,E_NAME,E_SAL) AS (SELECT EMP_ID,E_NAME,E_SAL FROM EMP_TABLE_TEST) , TEMP1 (EMP_ID,E_NAME,E_SAL) AS (
SELECT EMP_ID,E_NAME,E_SAL FROM TEMP) SELECT EMP_ID,E_NAME,E_SAL FROM TEMP1 

錯誤：SELECT失敗。 3807：對象'TEMP'不存在。

Teradata是否真的支持WITH WITH子句中的WITH WITH子句或WITH？

我聽說它在14.x更高版本中支持，但它不支持15.x.

Answer 1

的語法是不同的（並且是相同的其他數據庫）
With t1 as (...),t2 as (...), t3 as (...) select ...

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目前參照順序是顛倒 -
T2可以參考t3和T1可以參考t2和t3 。
TD16支持「正確」訂單。

Answer 2

這已被固定在Teradata的16請參見發行總結第2章

http://www.info.teradata.com/doclist.cfm?RetainParams=Y&FilterCall=Y&selDocType=100

Previously, when a nonrecursive WITH clause defined multiple CTEs, a CTE could only reference a subsequent CTE in the WITH clause. Now, a CTE can reference a preceding or subsequent CTE in the WITH clause.

從Teradata的發行概要版16