Query for Serial number

Question

Hello all,
I want a query for show all the record along with serial number.Here i mentioned a sample table along with data.
COMPCODE
ITEMCODE
ACTIVITY
DESIGNATION
QTY
105
001
A13
D7
50
105
001
A22
D7
44
105
001
A34
7
54
105
001
A45
D7
34
105
001
A45
D8
54
105
001
A52
D13
32
105
001
A52
D14
3
105
001
A61
D2
43
105
002
A12
D1
43
105
002
A25
D1
53
105
002
A35
D5
42
105
002
A35
D4
45
105
002
A35
D3
65
105
002
A44
D2
423
105
002
A55
D3
43
105
002
A62
D4
65
These is the sample table along with data.My requirement is I want show the serial number based on the itemcode and activity.
The final result should be  like this
COMPCODE
ITEMCODE
SLNO
ACTIVITY
DESIGNATION
QTY
105
001
1
A13
D7
50
105
001
2
A22
D7
44
105
001
3
A34
D7
54
105
001
4
A45
D7
34
105
001
4
A45
D8
54
105
001
5
A52
D13
32
105
001
5
A52
D14
3
105
001
6
A61
D2
43
105
002
1
A12
D1
43
105
002
2
A25
D1
53
105
002
3
A35
D5
42
105
002
3
A35
D4
45
105
002
3
A35
D3
65
105
002
4
A44
D2
423
105
002
5
A55
D3
43
105
002
6
A62
D4
65
I tried write a query  used with row_number() function  but i didn't get the exact output.kindly help me for getting this type of output

Answer 1

I see, try dense_rank instead:
SQL> with your_view_resultset as (
  2  select 105 compcode, 001 itemcode, 'A13' activity, 'D7' designation, 50 qty from dual union
  3  select 105, 001, 'A22', 'D7', 44 from dual union
  4  select 105, 001, 'A34', '7', 54 from dual union
  5  select 105, 001, 'A45', 'D7', 34 from dual union
  6  select 105, 001, 'A45', 'D8', 54 from dual union
  7  select 105, 001, 'A52', 'D13', 32 from dual union
  8  select 105, 001, 'A52', 'D14', 3 from dual union
  9  select 105, 001, 'A61', 'D2', 43 from dual union
10  select 105, 002, 'A12', 'D1', 43 from dual union
11  select 105, 002, 'A25', 'D1', 53 from dual union
12  select 105, 002, 'A35', 'D5', 42 from dual union
13  select 105, 002, 'A35', 'D4', 45 from dual union
14  select 105, 002, 'A35', 'D3', 65 from dual union
15  select 105, 002, 'A44', 'D2', 423 from dual union
16  select 105, 002, 'A55', 'D3', 43 from dual union
17  select 105, 002, 'A62', 'D4', 65 from dual
18  )
19  --
20  --
21  --
22  select t.*
23  ,      dense_rank() over (partition by t.itemcode order by t.itemcode, t.activity) slno
24  from   your_view_resultset t
25  order by t.itemcode, t.activity;
  COMPCODE   ITEMCODE ACT DES        QTY       SLNO
       105          1 A13 D7          50          1
       105          1 A22 D7          44          2
       105          1 A34 7           54          3
       105          1 A45 D7          34          4
       105          1 A45 D8          54          4
       105          1 A52 D13         32          5
       105          1 A52 D14          3          5
       105          1 A61 D2          43          6
       105          2 A12 D1          43          1
       105          2 A25 D1          53          2
       105          2 A35 D3          65          3
       105          2 A35 D4          45          3
       105          2 A35 D5          42          3
       105          2 A44 D2         423          4
       105          2 A55 D3          43          5
       105          2 A62 D4          65          6
16 rows selected.