Logical table with data restrictions from the physical table

Question

Hello, I have a question about the relationships between the Logical Tables in Business Model and Mapping and The Physical table in the physical layer. The problem is the next one:
I have a Physical Table named T1 that contains the attributes: Id, DateChangeState, State,…
T1
DateChangeState| ID |State     | Other columns….
01/01/2011 | 1 | 03 |     …
02/01/2011 | 1 |     11 |     …
03/01/2011 | 1 |     02 |     …
02/02/2011 | 2 |     01 |     …
03/02/2011 | 2 |     02 |     …
I need filter this table and extract only one row per ID. The row that I need is the row who contains the Max(DateChangeState) per ID. I don’t know how extract only the rows selected from the physical table to the Logical Table.
I need that the logical table contains the next rows:
T1_Logical
DateChangeState |ID |     State     Other columns….
03/01/2011 | 1 | 02 |     …
03/02/2011 | 2 | 02 |     …
How can I extract only the rows with the Max(DateChangeState) grouped by ID in the BMM?
I thought put this condition in the column mapping (CASE WHEN DateChangeState=Max(DateChangeState)) but the Max(DateChangeState) was not grouped by ID.
Any idea about how solve this problem?
I can not use the group by in the answer and I can not change the physical layer.
Thank you,
Best Regards.

Answer 1

Hi Rajeevagrl your solution is very good but I dont´t know why obiee is applying twice the max condition, The select is the next one:
select distinct D1.c1 as c1,
D1.c2 as c2,
D1.c1 as c3
from
(select D1.c1 as c1,
D1.c2 as c2
from
(select D1.c1 as c1,
D1.c2 as c2,
max(D1.c3) over () as c3
from
(select T379.ID as c1,
T379.DATE as c2,
max(T379.DATE) as c3
from
T1 T379
group by T379.ID, T379.DATE
) D1
) D1
where ( D1.c2 = D1.c3 )
) D1
order by c2
Edited by: 848497 on 14-abr-2011 3:58