independent research case and accents

Hello
I'm new on PL so sorry if it shows with the post :). I'm doing a Research independent of case and accents in the Apex without the help of the upper and lower functions. I found nlssort to solve this problem, but I don't know if I'm doing something wrong or can't do.

nlssort works very well when it is used like this:
select *
from Items_V
where nlssort(Name,'nls_sort=spanish_ai') like (nlssort(:P5_Name,'nls_sort=spanish_ai'))
what I also need is results that contain the name and in addition to that a case in the where clause.

The following code is what I have now and _where I want to include the nlssort_. It returns all the items containing Null values and P5_Name or correspondence.
select *
from Items_V
where  ((Name like (case when to_char(:P5_Sel)='1' then nvl('%'||:P5_Name||'%','%' )
                         else '%' end)
        and Name is not null) 
        or ((case when to_char(:P5_Sel)='1' then nvl('%'||:P5_Name||'%','%' )
                 else '%' end) ='%' and Name is null))                    
I tried many ways, but I just can't get the right combination and don't really know where to go. Try starting with a simpler approach, I found this concatenation + '%' + nlssort(:P5_Name,'nls_sort=spanish_ai') was not returning items contained, only items that match.


Thank you in advance,
Marc

BTW, I develop on:
DB 11g
Request Express 3.1.1.00.09

a common need for which I have not found another way to solve: independent research case and accents.

How about smth like (assuming you're on 10g or more):

SQL>  var p5 varchar2(50)

SQL>  exec :p5 := 'ae'
PL/SQL procedure successfully completed.

SQL>  with t as
(
 select 'Âero' str from dual
)
 select * from t where regexp_like(convert(str,'us7ascii'), convert(:p5,'us7ascii'),'i')

STR
----
Âero
1 row selected.

Tags: Database

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