我可以在另一个内部使用With吗？

Question

我正在尝试创建类似的东西，但最终会出错。不确定这是否是正确的方法。

WITH SECONDMAIN AS
(
     WITH MAIN AS
     (
         SELECT
         ....
     )
     SELECT
        *
     FROM MAIN M
     JOIN ....
)

SELECT * FROM SECONDMAIN SM;

Answer 1

语法为-

 WITH MAIN AS
 (
     SELECT
     ....
 ), 
 SECONDMAIN AS
 (
     SELECT
        *
     FROM MAIN M
     JOIN ....
)

SELECT * FROM SECONDMAIN SM;