如何在单个查询中定义多个（WITH AS FUNCTIONS）？

Question

试图在单个 with 子句下定义多个函数。我们通常为 CTE 所做的。但对于功能来说，同样是行不通的。请提出解决方案。

With function dt ( b as number) 
return number is 
n number ; 
begin 
select  1 into n; 
return n ; 
end ; 
dt2 ( c as number) 
return number is 
n1 number ; 
begin 
select  1 into n; 
return n1; 
end ; 

select dt(1) , dt2(1) from dual

仅使用 dt 时，我可以获得 o/p 但不能使用 dt2。

Answer 1

正在使用以下示例：

with 
  function x(p_NUM in number) return number
  is
    n number;
  begin
    SELECT 1 INTO N FROM DUAL;
    --
    return N;
    --
  end ; 
  --      
  function Y(p_NUM in number) return number
  is 
    N1 NUMBER;
  begin
    SELECT 2 INTO N1 FROM DUAL;
    --
    return N1;
    --
  end ; 
--
select X(1), Y(1)
from dual;

干杯！！

如何在单个查询中定义多个（WITH AS FUNCTIONS）？

how to define multiple (WITH AS FUNCTIONS) in a single query?

oracle

oracle12c

with-statement