Display Null when the column has a value of specific date

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  Table: digital_val

  SNO cl C2

  1 San1 11

  2 22 San2

  Actual result: expected to A         B

  A            B                                                                           11        22

  11 NULL

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• update of NULL in the column with the values of the adjacent column

  Examples of data

  with test_data as
  (select 1 as one, null as two, 2 as three,5 as four, 6 as five, null as six from dual
  union all
  select 1 as one, null as two, 2 as three,5 as four, 6 as five, null as six from dual)
  select * from test_data;
  

  This is one of those cases, the case may be where any value of a column can be null

  or two similar columns can be null. If the column is null then I want to update the adjacent column

  average value of the column, if the first column is null so I want to take the next non-null column and update, if the last column is null

  so I want to take prev not zero column and to update.

  In this case would be my expected output

  Un	Two	Three	Four	Five	Six
  1	1.5	2	5	6	6
  1	2	3	5	6	6

  Prospects for the future the suggesion or advice.

  Or, using Analytics:

  SQL> with test_data (id, one, two, three, four, five, six) as (
    2    select 1, 1   , null, 2   , 5, 6, null  from dual union all
    3    select 2, 1   , null, 3   , 5, 6, null  from dual union all
    4    select 3, 1   , null, null, 5, 6, null  from dual union all
    5    select 4, null, null, null, 5, 6, null  from dual
    6  )
    7  select *
    8  from (
    9    select id
   10         , cell
   11         , case when next_nn is not null and prev_nn is not null
   12             then (next_nn + prev_nn)/2
   13             else nvl(next_nn, prev_nn)
   14           end val
   15    from (
   16      select id
   17           , cell
   18           , val
   19           , last_value(val) ignore nulls over(partition by id order by cell) as prev_nn
   20           , first_value(val) ignore nulls over(partition by id order by cell range between current row and unbounded following) as next_nn
   21      from test_data
   22      unpivot include nulls (val for cell in (one as 1, two as 2, three as 3, four as 4, five as 5, six as 6) )
   23    )
   24  )
   25  pivot ( min(val) for cell in (1 as "ONE", 2 as "TWO", 3 as "THREE", 4 as "FOUR", 5 as "FIVE", 6 as "SIX") )
   26  ;
  
          ID        ONE        TWO      THREE       FOUR       FIVE        SIX
  ---------- ---------- ---------- ---------- ---------- ---------- ----------
           1          1        1,5          2          5          6          6
           2          1          2          3          5          6          6
           3          1          3          3          5          6          6
           4          5          5          5          5          6          6