问题
When using multiple CTE's in MSSQL 2008, I normally separate them with a comma.
But when I try this in a Teradata environment, I get an error with the syntax.
Works in MS SQL:
WITH CTE1 AS
(SELECT TOP 2 Name FROM Sales.Store)
,CTE2 AS
(SELECT TOP 2 ProductNumber, Name FROM Production.Product)
,CTE3 AS
(SELECT TOP 2 Name FROM Person.ContactType)
SELECT * FROM CTE1,CTE2,CTE3
Now, attempting to put into Teradata syntax:
WITH RECURSIVE CTE1 (Name) AS
(SELECT TOP 2 Name FROM Sales.Store)
,RECURSIVE CTE2 (ProductNumber, Name) AS
(SELECT TOP 2 ProductNumber, Name FROM Production.Product)
,RECURSIVE CTE3 (Name) AS
(SELECT TOP 2 Name FROM Person.ContactType)
SELECT *
FROM CTE1,CTE2,CTE3
Syntax error, expected something like a name or a Unicode delimited identifier between ',' and the 'RECURSIVE' keyword.
2nd attempt (without using RECURSIVE multiple times)
WITH RECURSIVE CTE1 (Name) AS
(SELECT TOP 2 Name FROM Sales.Store)
,CTE2 (ProductNumber, Name) AS
(SELECT TOP 2 ProductNumber, Name FROM Production.Product)
,CTE3 (Name) AS
(SELECT TOP 2 Name FROM Person.ContactType)
SELECT *
FROM CTE1,CTE2,CTE3
Multiple WITH definitions are not supported.
回答1:
Multiple CTEs are supported on version 14.0 of Teradata. You can download TD v14 for VMware from the Teradata Developer Network web site and test it out.
来源：https://stackoverflow.com/questions/15661416/teradata-sql-syntax-common-table-expressions