teradata 中的多个公用表表达式

Question

根据this teradata v14.0支持多个公共表表达式。所以简化的脚本如下：

WITH CTE1 AS
(
    SELECT       
                X                                       
        FROM SomeTable
)
,CTE2 AS
(
        SELECT top 10 X FROM CTE1
)
SELECT * FROM CTE2

应该可以。不幸的是，我得到：

Object 'CTE1' does not exist.

有什么想法吗？

Answer 1

对于 Teradata，表的顺序应颠倒如下 -

WITH CTE2 AS
(
        SELECT top 10 X FROM CTE1
),
CTE1 AS
(
    SELECT       
                X                                       
        FROM SomeTable
)
SELECT * FROM CTE2