How to realize the data based on a single column grouping

Hello PL/SQL gurus and experts.

I use Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64-bit Production version
I have table-
DROP TABLE T2;
create table T2(Manager,Employee) as select
'Nikki','Ram' from dual union all select
'Nina', 'Rita' from DUAL union all select
'Mike', 'Radha' from dual union all select
'Michael', 'Ratnam' from DUAL union all select
'Hendi', 'Ratna' from dual union all select
'Robert', 'Raman' from dual union all select
'Maria', 'Rolly' from dual union all select
'Kistrien', 'Rachna' from dual union all select
'Andrew', 'Ritvik' from dual union all select
'Emma', 'Ramesh' from dual union all select
'Andy', 'Ranpal' from dual union all select
'Brandy', 'Raunak' from dual union all select
'Nikki','Shyam' from dual union all select
'Nina', 'Sita' from DUAL union all select
'Mike', 'Sadhna' from dual union all select
'Michael', 'Satnam' from DUAL union all select
'Hendi', 'Satna' from dual union all select
'Robert', 'Samar' from dual union all select
'Maria', 'Sameer' from dual union all select
'Kistrien', 'Samrachna' from dual union all select
'Andrew', 'Satvik' from dual union all select
'Emma', 'Somesh' from dual union all select
'Andy', 'Sonpal' from dual union all select
'Brandy', 'Samar' from dual union all select
'Emma', 'Piyush' from dual union all select
'Andy', 'Pavan' from dual union all select
'Brandy', 'Paramjeet' from dual;
Results-
Manager          Employee
Nikki
          Ram
          Shyam
Nina           Rita
          Sita
Mike           Radha
          Sadhna
Michael      Ratnam
          Satnam
Hendi           Ratna
          Satna
Robert          Raman
          Samar
Maria          Rolly
          Sameer
Kistrien     Rachna
          Samrachna
Andrew          Ritvik
          Satvik
Emma          Ramesh
          Somesh
          Piyush
Andy          Ranpal
          Sonpal
          Pavan
Brandy          Raunak
          Samar
          Paramjeet
I thank you all in advance for your valuable time and input

In SQL, something like that...

SQL> ed
Wrote file afiedt.buf

  1  select case when row_number() over (partition by emp.manager order by employee) = 1 then
  2           mgr.manager
  3         else
  4           null
  5         end as manager
  6        ,emp.employee
  7  from (select distinct manager from t2) mgr
  8       join t2 emp on (mgr.manager = emp.manager)
  9* order by mgr.manager, emp.employee
SQL> /

MANAGER  EMPLOYEE
-------- ---------
Andrew   Ritvik
         Satvik
Andy     Pavan
         Ranpal
         Sonpal
Brandy   Paramjeet
         Raunak
         Samar
Emma     Piyush
         Ramesh
         Somesh
Hendi    Ratna
         Satna
Kistrien Rachna
         Samrachna
Maria    Rolly
         Sameer
Michael  Ratnam
         Satnam
Mike     Radha
         Sadhna
Nikki    Ram
         Shyam
Nina     Rita
         Sita
Robert   Raman
         Samar

27 rows selected.

If you want managers of their own ranks with employees you will need to it fudge.

SQL> ed
Wrote file afiedt.buf

  1  select case when row_number() over (partition by emp.manager order by employee nulls first) = 1 then
  2           mgr.manager
  3         else
  4           null
  5         end as manager
  6        ,emp.employee
  7  from (select distinct manager from t2) mgr
  8       join
  9       (select distinct manager, null as employee from t2
 10        union all
 11        select manager, employee from t2
 12       ) emp on (mgr.manager = emp.manager)
 13* order by mgr.manager, emp.employee nulls first
SQL> /

MANAGER  EMPLOYEE
-------- ---------
Andrew
         Ritvik
         Satvik
Andy
         Pavan
         Ranpal
         Sonpal
Brandy
         Paramjeet
         Raunak
         Samar
Emma
         Piyush
         Ramesh
         Somesh
Hendi
         Ratna
         Satna
Kistrien
         Rachna
         Samrachna
Maria
         Rolly
         Sameer
Michael
         Ratnam
         Satnam
Mike
         Radha
         Sadhna
Nikki
         Ram
         Shyam
Nina
         Rita
         Sita
Robert
         Raman
         Samar

39 rows selected.

Tags: Database

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    user4587979 wrote:
    Hi Frank

    Yes, but I had more than 2 tables with item_characteristics, type_characteristics

    If there are other tables involved, then CREATE TABLE and INSERT statements for them (for the relevant columns only). You must not post a lot of examples of data; usually just a couple of lines per table is enough to show the problem.
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    What I try to do is, I'm comparing new_value in log_item_characteristics (whichever is most recent) with CHR_VALUE in the item_characteristics and the needs of different output values

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    Please can you help me

    What you've posted so far is like saying "I'm going 200 meters to the North, and then 500 meters East, but I'm not getting where I want to go." I would have a better chance to help you if you said, 'I'm out of my house, at 100, Elm Street and try to get to the supermarket at Broadway 279. I'm going 200 meters to the North... ', or, even better. "I want to buy a newspaper and some orange juice, so I thought I'd go to a convenience store. I start at my house, at 100, Elm Street... »
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    Use and

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