sql - Oracle SQL insert into with with 子句

Question

我是 sql 的新手，所以这可能是一个愚蠢的问题，但是有没有可能将 With 子句与 Insert Into 一起使用？或者有什么常见的解决方法？我的意思是这样的:

With helper_table As (
Select * From dummy2
)
Insert Into dummy1 Values (Select t.a From helper_table t Where t.a = 'X' );

谢谢!

我的例子太假了，所以我添加了一些扩展代码(感谢到目前为止的答案)。

INSERT
INTO    dummy values (a,b)  //more values
WITH    helper_table AS
    (
    SELECT  *
    FROM    dummy2
    )
WITH    helper_table2 AS   //from more tables
    (
    SELECT  *
    FROM    dummy3
    )         
SELECT  t.value as a, t2.value as b
FROM    helper_table t 
join helper_table t2 on t.value = t2.value //some join
WHERE   t.value = 'X' and t2.value = 'X'   //other stuff

Answer 1

您可以根据需要使用任意数量的“helper_tables”。

create table t(helper1 varchar2(50) , helper2 varchar2(50) , dataElement varchar2(50) );


insert into t(helper1, helper2, dataelement)
with
     de as(select level lvl from dual connect by level <10)
     ,h1 as (select lvl, lvl/1.5 hp from de)
     ,h2 as (select lvl,  lvl/2 hp2 from de)
select h1.hp , h2.hp2, de.lvl
  from de 
        inner join
       h1 on de.lvl = h1.lvl
        inner join
       h2 on de.lvl = h2.lvl
/

考虑到这一点，您可以通过将表正常连接到主表来完成所有连接