oracle sql count value for weeks until a specific column changes

Question

i try to count values for specific tasks even if they not have been changed. I need to count the status for every week, until the status changes (then the new status have to be count). I got the following table as a result for the basic values.

SRQNR      KW   Status
TB-17-0002  1   Status 05
TB-17-0002  1   Status 20
TB-17-0002  1   Status 25
TB-17-0002  1   Status 30
TB-17-0002  8   Status 40
TB-17-0002  8   Status 44
TB-17-0002  8   Status 45
TB-17-0004  1   Status 05
TB-17-0004  1   Status 20
TB-17-0004  2   Status 25
TB-17-0004  2   Status 30
TB-17-0004  2   Status 40
TB-17-0004  2   Status 44
TB-17-0004  4   Status 70
TB-17-0004  4   Status 85
TB-17-0004  4   Status 90
TB-17-0005  1   Status 05
TB-17-0005  1   Status 20
TB-17-0005  1   Status 25
TB-17-0005  1   Status 30
TB-17-0005  2   Status 40
TB-17-0005  2   Status 44
TB-17-0005  6   Status 45
TB-17-0006  1   Status 05
TB-17-0006  1   Status 20
TB-17-0006  1   Status 25
TB-17-0006  1   Status 30
TB-17-0006  1   Status 40
TB-17-0006  11  Status 44
TB-17-0006  11  Status 45
TB-17-0007  1   Status 05
TB-17-0007  1   Status 20
TB-17-0007  1   Status 25
TB-17-0007  1   Status 30
TB-17-0007  2   Status 40
TB-17-0007  2   Status 44
TB-17-0007  2   Status 45
TB-17-0008  1   Status 05
TB-17-0008  1   Status 20
TB-17-0008  2   Status 25
TB-17-0008  2   Status 30
TB-17-0008  2   Status 40
TB-17-0008  2   Status 44
TB-17-0008  2   Status 45
TB-17-0009  1   Status 05
TB-17-0009  1   Status 20
TB-17-0009  1   Status 25
TB-17-0009  1   Status 30
TB-17-0009  1   Status 40
TB-17-0009  15  Status 44
TB-17-0009  15  Status 45
TB-17-0010  1   Status 05
TB-17-0010  1   Status 20
TB-17-0010  1   Status 25
TB-17-0010  1   Status 30
TB-17-0010  1   Status 40
TB-17-0010  1   Status 44
TB-17-0010  5   Status 45
TB-17-0011  1   Status 05
TB-17-0011  1   Status 20
TB-17-0011  1   Status 25
TB-17-0011  11  Status 30
TB-17-0011  11  Status 40
TB-17-0011  11  Status 44
TB-17-0011  11  Status 70
TB-17-0011  11  Status 85
TB-17-0011  20  Status 90

For example the srqnr TB-17-0002 got Status 30 in KW 1 and changes to Status 40 in KW8. Now my aspiration is that for KW 2,3,4,5,6,7 Status 30 will be counted.

Because the SRQNS is still in KW 3 or 4 in Status 30 and this should be in the interpretation as well.

Thanks for your solutions.

Answer 1

With a derived set of ranges as rows, and KW as a set of columns, this appears to want grouping by those ranges, then pivoting by KW values. From the sample data given this result was produced:

+----------+------+------+------+------+------+------+------+------+------+------+----+------+------+------+------+------+------+------+------+------+
|  RANGES  |  1   |  2   |  3   |  4   |  5   |  6   |  7   |  8   |  9   |  10  | 11 |  12  |  13  |  14  |  15  |  16  |  17  |  18  |  19  |  20  |
+----------+------+------+------+------+------+------+------+------+------+------+----+------+------+------+------+------+------+------+------+------+
| <=29     | 31   | 4    | null | null | null | null | null | null | null | null |  1 | null | null | null | null | null | null | null | null | null |
| 30 to 69 | 4    | 10   | null | null | 1    | 1    | null | 3    | null | null |  4 | null | null | null | 2    | null | null | null | null | null |
| 70 to 84 | null | null | null | 1    | null | null | null | null | null | null |  1 | null | null | null | null | null | null | null | null | null |
| 85 to 90 | null | null | null | 2    | null | null | null | null | null | null |  1 | null | null | null | null | null | null | null | null | 1    |
+----------+------+------+------+------+------+------+------+------+------+------+----+------+------+------+------+------+------+------+------+------+

Using this query:

SELECT 
   * 
FROM (
        select
           case when substr(status,-2,2) < '30' then '<=29'
                when substr(status,-2,2) between '30' and '69' then '30 to 69'
                when substr(status,-2,2) between '70' and '84' then '70 to 84'
                when substr(status,-2,2) between '85' and '90' then '85 to 90'
                else '???'
                end as ranges
         , KW
         , count(*) as counter
        from mytable t
        group by
           case when substr(status,-2,2) <= '30' then '<=29'
                when substr(status,-2,2) between '30' and '69' then '30 to 69'
                when substr(status,-2,2) between '70' and '84' then '70 to 84'
                when substr(status,-2,2) between '85' and '90' then '85 to 90'
                else '???'
                end
         , KW
        )
PIVOT (
   SUM(counter) 
   FOR 
      (KW) 
   IN 
      (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20)
    )
;

Note I have not tried to be careful with the substring handling from Status to ranges. You might prefer to use IN(...) depending on the actual data in that column.

dbfiddle here