How to combine many rows into one row

Question

Hi all,
I have a question regarding to how to combine many rows into one row?
My result set is like that:
ITEM_NO NAME1
11 abc
11 cde
11 fg
Want to combine them into
ITEM_NO NAME1
11 abc;cde;fg
would anybody can tell me how to do that? Thanks
Ray

Answer 1

You can check this --
satyaki>
satyaki>
satyaki>create table t
  2  as
  3      select 11 ITEM_NO, 'abc' NAME1 from dual
  4      union all
  5      select 11 ITEM_NO, 'cde' NAME1 from dual
  6      union all
  7      select 11 ITEM_NO, 'fg' NAME1 from dual;
Table created.
satyaki>
satyaki>
satyaki>
satyaki>set lin 10
satyaki>
satyaki>desc t;
Name              Null?    Type
ITEM_NO                    NUMBER
NAME1                      VARCHAR2(3)
satyaki>
satyaki>
satyaki>set lin 1000
satyaki>
satyaki>
satyaki>
satyaki>SELECT ITEM_NO,
  2         LTRIM(MAX(SYS_CONNECT_BY_PATH(NAME1,';'))
  3         KEEP (DENSE_RANK LAST ORDER BY curr),';') AS NAME1_DET
  4  FROM   (SELECT ITEM_NO,
  5                 NAME1,
  6                 ROW_NUMBER() OVER (PARTITION BY ITEM_NO ORDER BY NAME1) AS curr,
  7                 ROW_NUMBER() OVER (PARTITION BY ITEM_NO ORDER BY NAME1) -1 AS prev
  8          FROM   t)
  9  GROUP BY ITEM_NO
10  CONNECT BY prev = PRIOR curr AND ITEM_NO = PRIOR ITEM_NO
11  START WITH curr = 1;
   ITEM_NO  NAME1_DET
        11  abc;cde;fgRegards.
Satyaki De.