using to_char ('date', IW) in a different way

Hello all;

I have the sample data below
create table table_one
(
 v_id varchar2(60),
 close_date date
);

insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/1/2010 4:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/2/2010 2:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('A', to_date('1/3/2010 1:47:19 PM', 'MM/DD/YYYY HH:MI:SS:AM'));   
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/4/2010 5:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/5/2010 4:47:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/6/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  


insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/7/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/8/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/9/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('D', to_date('1/10/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/11/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/12/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
  insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/13/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM'));  
    insert into table_one
  (v_id, close_date)
values
  ('L', to_date('1/14/2010 5:17:09 PM', 'MM/DD/YYYY HH:MI:SS:AM')); 
and basically, I have the following sql to be changed
  select y.v_id, to_char(y.close_date, 'IW') as d_date   from table_one y
  group by to_char(y.close_date, 'IW'), y.v_id;
this query gives me this output below

V_ID     D_DATE
D              01
L               02
A               53
However, although that's what I want instead
V_ID             D_DATE
D                 1/4/2010  - 1/10/2010
L                  1/11/2010 - 1/17/2010
A                 1/1/2010 - 1/3/2010
This is based on the ISO week. Thank you.
Any help is appreciated

Hello

Thanks for posting the CREATE TABLE and INSERT statements; It is very useful.
It would be even more useful if you explain how you get the results you want from this sample data.
Rather than display the week number of the group, it seems that you want to display the first and last date of the group. Is this fair?

If so:

SELECT    y.v_id
,       TO_CHAR ( MIN (y.close_date)
              , 'fmMM/DD/YYYY'
            )
      ||  ' - '
      ||  TO_CHAR ( MAX (y.close_date)
              , 'fmMM/DD/YYYY'
            )     AS d_date
FROM       table_one     y
GROUP BY  TO_CHAR (y.close_date, 'IW')
,            y.v_id;

Tags: Database

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