Problem with analytic function

Question

Hi ,
I have table with fields :
ID ,BUG_ID ,COMMENT_TEXT
sample values are
ID BUG_ID COMMENT_TEXT
1 2 test1
2 3 test1
3 2 test2
4 5 test1
5 5 test2
6 2 test3
and I am using following script to get the output
like :
BUG_ID CMNT_TEXT1 COMNT_TEXT2 CMNT_TEXT3
2 test1 test2 test3
3 test1
5 test1 test2
SQL Script is :
select bug_id,
max(decode(seq_no,1,DBMS_LOB.substr(ctext,4000,1))) as comment_text1,
max(decode(seq_no,2,DBMS_LOB.substr(ctext,4000,1))) as comment_text2,
max(decode(seq_no,3,DBMS_LOB.substr(ctext,4000,1))) as comment_text3,
max(decode(seq_no,4,DBMS_LOB.substr(ctext,4000,1))) as comment_text4,
max(decode(seq_no,5,DBMS_LOB.substr(ctext,4000,1))) as comment_text5
from (
select bug_id,
ctext,
row_number() over
(partition by bug_id order by bug_id) as seq_no
from phpbt_dblearn_comment
group by bug_id
but it is always first values ( eg test1 for bug_id 2 , test1 for bug_id 5 ) are missing if i run this script.
Please could someone tell me What is wrong with this script ?
regards,
Karna

Answer 1

Hi Karna,
maybe i don't see the problem but that's what i get from my tests:
ID BUG_ID CTEXT
1 2 test1
2 3 test1
3 2 test2
4 5 test1
5 5 test2
6 2 test3
6 Zeilen ausgewählt.
select bug_id,
max(decode(seq_no,1,DBMS_LOB.substr(ctext,4000,1))) as comment_text1,
max(decode(seq_no,2,DBMS_LOB.substr(ctext,4000,1))) as comment_text2,
max(decode(seq_no,3,DBMS_LOB.substr(ctext,4000,1))) as comment_text3,
max(decode(seq_no,4,DBMS_LOB.substr(ctext,4000,1))) as comment_text4,
max(decode(seq_no,5,DBMS_LOB.substr(ctext,4000,1))) as comment_text5
from (
select bug_id,
ctext,
row_number() over
(partition by bug_id order by id) as seq_no
from test2
group by bug_id;
BUG_ID COMMENT_TEXT1 COMMENT_TEXT2 COMMENT_TEXT3 COMMENT_TEXT4 COMMENT_TEXT5
2 test1 test2 test3
3 test1
5 test1 test2
3 Zeilen ausgewählt.
I thought that's what you're lokking for.
Regards,
Alexander