WITH RECURSIVE作为查询中的第二部分CTE。 Postgres的

Question

我怎么能写这样的查询：

with t1 as 
(
select id 
from table1
),
RECURSIVE t2(
select * from t2
union
...
)

目前不允许这样做？

Answer 1

无论你在哪里放置递归CTE，recursive都需要在WITH之后：

with recursive t1 as 
(
  select id 
  from table1
), t2 (
  select *  
  from t2
  union
  ...
)
...