Query Unique Records WITH ROWID

Question

Hi All,
I have 2 columns which returns records like this Say Column A and Column B.
A B
1 1
1 1
2 2
2 2
3, 3
I need only distinct records from these columns. So i executed DISTINCT Clause in my query and it returned unique records. Issue is I need to execute a query like this i.e compulsorily use ROWID in my select list.
i.e SELECT DISTINCT ROWID A, B from TEST;
But this query we will give duplicated records only when we give rowid, how to achieve a output like this using rowid in the column select list of my query.
A B
1 1
2 2
3, 3
Please Help.
Thanks in advance.

Answer 1

If you want just one rowid for each (a, b) couple:
SQL> select a, b, min(rowid)
  2  from y
  3  group by a, b;
         A          B MIN(ROWID)
         1          1 AAAfoUAAEAAA7T0AAA
         2          2 AAAfoUAAEAAA7T0AAC
         3          3 AAAfoUAAEAAA7T0AAEIf you want all rowid's for each couple:
SQL>select a, b, rtrim(extract(xmlagg(xmlelement("a",rowid||',')),'//text()'),',') rowids
  2  from y
  3* group by a, b
         A          B ROWIDS
         1          1 AAAfoUAAEAAA7T0AAA,AAAfoUAAEAAA7T0AAB
         2          2 AAAfoUAAEAAA7T0AAC,AAAfoUAAEAAA7T0AAD
         3          3 AAAfoUAAEAAA7T0AAEThanks Buga for posting sample data ;)
Max
[My Italian Oracle blog| http://oracleitalia.wordpress.com/2010/02/07/aggiornare-una-tabella-con-listruzione-merge/]