SQL Select grouping by value

Question

Hi ,
I have an output after a join statement and i have output
which is like below.
I have an output containing two colums with same data except for the emp_depts and would like to write a select statement which will give a single row as opposed to two rows as below.
Current out put view.
emp_no emp_Name emp_Depts
1 Test HR
1 Test Finance
Desired output.
1 Test HR,Finance
Can some one please help.

Answer 1

If you are on 10g:
SQL> create table mytable
  2  as
  3  select 1 emp_no, 'Test' emp_Name, 'HR' emp_Depts from dual union all
  4  select 1, 'Test', 'Finance' from dual
  5  /
Tabel is aangemaakt.
SQL> with t as
  2  ( select emp_no,emp_name,substr(ed,2) emp_depts,rn
  3      from mytable
  4     model
  5           partition by (emp_no,emp_name)
  6           dimension by (row_number() over (partition by emp_no order by null) rn)
  7           measures (cast(emp_depts as varchar2(50)) ed)
  8           rules
  9           ( ed[any] order by rn desc = ed[cv()+1] || ',' || ed[cv()]
10           )
11  )
12  select emp_no
13       , emp_name
14       , emp_depts
15    from t
16   where rn = 1
17  /
    EMP_NO EMP_ EMP_DEPTS
         1 Test HR,Finance
1 rij is geselecteerd.And this technique is not called pivoting, but string aggregation. If you search for this term you will see some other techniques as well.
Regards,
Rob.