Další alternativou je použití modelové klauzule:
SQL> select id
2 , value
3 from codes
4 model
5 return updated rows
6 partition by (id)
7 dimension by (-1 i)
8 measures (value)
9 ( value[for i from 0 to length(value[-1])-length(replace(value[-1],',')) increment 1]
10 = regexp_substr(value[-1],'[^,]+',1,cv(i)+1)
11 )
12 order by id
13 , i
14 /
ID VALUE
---------- -------------------
10 A
10 B
10 C
11 A
11 B
12 A
12 B
12 C
12 D
12 E
12 F
13 R
13 T
13 D
13 W
13 W
13 W
13 W
13 W
13 S
13 S
21 rows selected.
V tomto blogpostu jsem napsal až 6 alternativ pro tento typ dotazu:http://rwijk.blogspot.com/2007/11/interval-based-row-generation.html
S pozdravem, Robe.