UNPIVOT with two set of records

Hi Gurus,
I am using Oracle 11g Release 11.2.0.1.0
OS: windows
Table Structure
EMPL0YEE_ROLE
employee_id number
ROLE_1 VARCHAR2(10)
ROLE_2 VARCHAR2(10)
ROLE_3 VARCHAR2(10)
ROLE_4 VARCHAR2(10)
ROLE_5 VARCHAR2(10)
MANAGER_1 VARCHAR2(10)
MANAGER_2 VARCHAR2(10)
MANAGER_3 VARCHAR2(10)
MANAGER_4 VARCHAR2(10)
MANAGER_5 VARCHAR2(10)
DATA
EMPLOYEE_ID MANAGER_1 MANAGER_2 MANAGER_3 MANAGER_4 MANAGER_5 ROLE_1 ROLE_2 ROLE_3 ROLE_4 ROLE_5
1345 John Mike Ram Kumar DBA Sql Dev PLSQL Admin
1 rows selected
I want a output like this
EMPLOYEE_ID MANAGER ROLE1
1345 John DBA
1345 Mike SQL DEV
1345 Ram PLSQL
1345 Kumar Admin
I have tried with UNPIVOT
I am able to get manager and role in two different queries
SELECT
EMPLOYEE_ID
,MANAGER
FROM
EMPLOYEE_ROLE
UNPIVOT( MANAGER
FOR col1
in (MANAGER_1,
MANAGER_2,
MANAGER_3,
MANAGER_4,
MANAGER_5
EMPLOYEE_ID            MANAGER
1345                   John
1345                   Mike
1345                   Ram
1345                   Kumar
4 rows selected
SELECT
EMPLOYEE_ID
,ROLE1
FROM
EMPLOYEE_ROLE
UNPIVOT( ROLE1
FOR col1
in (ROLE_1,
ROLE_2,
ROLE_3,
ROLE_4,
ROLE_5
EMPLOYEE_ID            ROLE1
1345                   DBA
1345                   Sql Dev
1345                   PLSQL
1345                   Admin
4 rows selected
WHEN I tried adding 2 UNPIVOT clauses i got
SELECT
EMPLOYEE_ID
,ROLE1
,MANAGER
FROM
EMPLOYEE_ROLE
UNPIVOT( ROLE1
FOR col1
in (ROLE_1,
ROLE_2,
ROLE_3,
ROLE_4,
ROLE_5
UNPIVOT( MANAGER
FOR col2
in (MANAGER_1,
MANAGER_2,
MANAGER_3,
MANAGER_4,
MANAGER_5
it is giving me cartesian product as given below
EMPLOYEE_ID            ROLE1      MANAGER
1345                   DBA        John
1345                   DBA        Mike
1345                   DBA        Ram
1345                   DBA        Kumar
1345                   Sql Dev    John
1345                   Sql Dev    Mike
1345                   Sql Dev    Ram
1345                   Sql Dev    Kumar
1345                   PLSQL      John
1345                   PLSQL      Mike
1345                   PLSQL      Ram
1345                   PLSQL      Kumar
1345                   Admin      John
1345                   Admin      Mike
1345                   Admin      Ram
1345                   Admin      Kumar
16 rows selectedIs it possible to add two unpivots in a single UNPIVOT query.
Any help is appreciated.
Thanks!
Regards,
Gatha
Edited by: Gatha on Sep 27, 2011 1:50 PM
Edited by: Gatha on Sep 27, 2011 1:51 PM
Edited by: Gatha on Sep 27, 2011 1:53 PM
Edited by: Gatha on Sep 27, 2011 2:40 PM

You can use an object so that the couple (MANAGER, ROLE) is considered as a single column to unpivot :
SQL> create or replace type role_manager_obj as object (manager varchar2(10), role varchar2(10))
2 /
Type created
SQL> WITH emp AS (
2    SELECT employee_id
3         , case when manager_1 is not null then role_manager_obj(manager_1, role_1) end as rm1
4         , case when manager_2 is not null then role_manager_obj(manager_2, role_2) end as rm2
5         , case when manager_3 is not null then role_manager_obj(manager_3, role_3) end as rm3
6         , case when manager_4 is not null then role_manager_obj(manager_4, role_4) end as rm4
7         , case when manager_5 is not null then role_manager_obj(manager_5, role_5) end as rm5
8    FROM employee_role
9 )
10 SELECT employee_id
11       , treat(rm_obj as role_manager_obj).manager as manager
12       , treat(rm_obj as role_manager_obj).role as role
13 FROM emp
14 UNPIVOT(rm_obj FOR rm IN (rm1, rm2, rm3, rm4, rm5))
15 ;
EMPLOYEE_ID MANAGER    ROLE
       1345 John       DBA
       1345 Mike       SQL DEV
       1345 Ram        PLSQL
       1345 Kumar      Admin
Or, doing it the old way, with a cross join :
SQL> WITH five_rows AS ( SELECT level i FROM dual CONNECT BY level <= 5 )
2 SELECT employee_id
3       , manager
4       , role
5 FROM (
6    SELECT e.employee_id
7         , case t.i when 1 then manager_1
8                    when 2 then manager_2
9                    when 3 then manager_3
10                    when 4 then manager_4
11                    when 5 then manager_5
12           end as manager
13         , case t.i when 1 then role_1
14                    when 2 then role_2
15                    when 3 then role_3
16                    when 4 then role_4
17                    when 5 then role_5
18           end as role
19    FROM employee_role e
20         CROSS JOIN five_rows t
21 )
22 WHERE manager IS NOT NULL
23 ;
EMPLOYEE_ID MANAGER                                  ROLE
       1345 John                                     DBA
       1345 Mike                                     SQL DEV
       1345 Ram                                      PLSQL
       1345 Kumar                                    Admin
Edited by: odie_63 on 27 sept. 2011 13:04

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