如何制作動態pl / sql？

Question

我想在參數值中使用類型變量來創建動態pl / sql。

參數值>類型= {'名稱+位置'，'resno'，'hpno'，'telno'}；

例如，如果我得到了參數值（'resno'，'hpno'），則需要兩個組合查詢（全部2個並集），因此，這意味着查詢數量取決於參數值。

select * from (
--repeatation
select * from
(select a.custnm
     , 'name + place' as vtype
     , a.custnm || '-' || c.pjtcd || '-' || c.dong || '-' || c.ho as con
     , count(a.custid) as nodup 
from   custtable a
     , thng c 
where a.custid = c.custid(+)
group by a.custnm, c.pjtcd, c.dong, c.ho
having count(a.custid) > 1) x
--/repeatation
union all
--repeatation
select * from
(select a.custnm
     , 'resno' as vtype
     , a.resno as condup
     , count(a.custid) as nodup 
from   custtable a
group by a.custnm, a.resno
having count(a.custid) > 1) x2
--repeatation
union all
--repeatation
select * from
(select a.custnm
     , 'hpno' as vtype
     , a.hpno as condup
     , count(a.custid) as nodup 
from   custtable a
group by a.custnm, a.hpno
having count(a.custid) > 1) x3
--repeatation
union all
--repeatation
select * from
(select a.custnm
     , 'telno' as vtype
     , a.telno as condup
     , count(a.custid) as nodup 
from   custtable a
group by a.custnm, a.telno
having count(a.custid) > 1) x4
--repeatation
) 
order by decode(vtype, 'name +`enter code here` place', 1 ,'resno', 2 ,'hpno', 3,  'telno', 4), nodup desc

請讓我知道如何用參數值制作plsql

Answer 1

這是一個SELECT語句。 現在的編寫方式是SQL，而不是PL / SQL，我的建議是這樣 。 與其編寫可怕的PL / SQL（動態SQL通常不是很好），不如不基於該語句創建視圖 ？

create or replace view v_my_view as
select * from (
--repeatation
select * from
(select a.custnm
     , 'name + place' as vtype
<snip>

完成后，可在任何需要的地方使用它（包括PL / SQL）。