Insert missing numbers

Question

I have a data like this:
G1, 1
G1, 2
G1,
G1,
G2, 1
G2,
G2,
G2,
G2,
G3, 1
G3, 2
G3, 3
G3,
G3,
G3, I have to populate the missing numbers for each group. The data should look like this:
G1, 1
G1, 2
G1, 3
G1, 4
G2, 1
G2, 2
G2, 3
G2, 4
G2, 5
G3, 1
G3, 2
G3, 3
G3, 4
G3, 5
G3, 6Can it be done in SQL without using a stored procedure? Thanks.
Kumar

Answer 1

hi,
SQL> With T As
  2  (Select 'G1' col, 1 col1 From dual
  3  Union All
  4  Select 'G1', 2 From dual
  5  Union All
  6  Select 'G1', Null From dual
  7  Union All
  8  Select 'G1', Null From dual
  9  Union All
10  Select 'G2', 1  From dual
11  Union All
12  Select 'G2', Null From dual
13  Union All
14  Select 'G2', Null From dual
15  Union All
16  Select 'G2', Null From dual
17   Union All
18  Select 'G2', Null From dual
19  Union All
20  Select 'G3', 1 From dual
21  Union All
22  Select 'G3', 2 From dual
23  Union All
24  Select 'G3', 3 From dual
25  Union All
26  Select 'G3', Null From dual
27  Union All
28  Select 'G3', Null From dual
29  Union All
30  Select 'G3',Null From dual)
31  Select col, row_number() Over(Partition By col Order By col)col1
32    From T
33  /
CO       COL1
G1          1
G1          2
G1          3
G1          4
G2          1
G2          2
G2          3
G2          4
G2          5
G3          1
G3          2
CO       COL1
G3          3
G3          4
G3          5
G3          6
15 rows selected.