Concat different rows column into single row field

Question

Hi,
I have a table tblSite which has SiteID and SiteInvestigator. Can I concat different row base on siteID.
SiteID -- SiteInvestigator
1 -- x
1 -- y
2 -- z
2 -- x1
3 -- x2
Basicaly I want data look like this,
sitid --siteinvestigator
1 -- x,y
2 -- z,x1
3 -- x2
I want to use only sql query or create a view to get data like this. No stored procedure please.
Can somebody help?
Regards,
Vinay

Answer 1

this example might be of help.
SQL> select * from tab1;
COL1             COL2 COL3             COL4
Sofinummer          1 occupation          1
Sofinummer          1 occupation          2
Sofinummer          1 occupation          3
Sofinummer          2 occupation          1
SQL> select col1, col2,
  2         substr(replace(max(substr(sys_connect_by_path (col3||' '||
  3                                                        col4, '-'),2)),'-',' '),1,60)
  4         as col3
  5    from tab1
  6  start with col4 = 1
  7  connect by col4 = prior col4 + 1
  8  and prior col1 = col1
  9  and prior col2 = col2
10  group by col1, col2;
COL1             COL2 COL3
Sofinummer          1 occupation 1 occupation 2 occupation 3
Sofinummer          2 occupation 1
SQL>