Replace repeating lines with white and don't show the distinct values

Hi all

I have a SQL query that looks like this:

SELECT Item_id, item_details, category, group INC.
OF my_items
WHERE THE...

The results are as follows:

Item_id item_details category group

001 keyboard PC - 1 Grp1
001 keyboard PC - 2 Grp1
003 monitor PC - 1 Grp 1
003 monitor PC - 2 Grp 2

What I really want, it's like to have repeated as a draft values and keep only the distinct values. I want the output to be like this:

Item_id item_details category group

001 keyboard PC - 1 Grp1
PC-2
003 monitor PC - 1 Grp 1
PC - 2 Grp 2

Is there a way we can do that? Help, please

Here's a way using the Lag as mentioned by Tubby...

SQL> ed
Wrote file afiedt.buf

  1  with t as (select '001' as item_id, 'keyboard' as item_details, 'PC-1' as category, 'Grp1' as grp from dual union all
  2             select '001', 'keyboard', 'PC-2', 'Grp1' from dual union all
  3             select '003', 'monitor', 'PC-1', 'Grp1' from dual union all
  4             select '003', 'monitor', 'PC-2', 'Grp2' from dual)
  5  -- end of test data
  6  select decode(item_id, lag(item_id) over (partition by item_id order by category, grp), null, item_id) as item_id
  7        ,decode(item_details, lag(item_details) over (partition by item_id order by category, grp), null, item_details) as item_details
  8        ,decode(category, lag(category) over (partition by item_id order by category, grp), null, category) as category
  9        ,decode(grp, lag(grp) over (partition by item_id order by category, grp), null, grp) as grp
 10  from t
 11* order by t.item_id, t.category, t.grp
SQL> /

ITE ITEM_DET CATE GRP
--- -------- ---- ----
001 keyboard PC-1 Grp1
             PC-2
003 monitor  PC-1 Grp1
             PC-2 Grp2

SQL>

Tags: Database

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