Combining more than two fact tables

Hi,
I have been reading many texts about combining fact tables but i still haven't find answer to my question.
I have four fact tables that i would have to combine in to one. That's a simple task but is there anyway the to avoid joins when querying only one fact?
So am i waisting my time or is this possible?

Hi,
I think this is possible. I have not tried this in my enviroment yet, but how about creating multiple LTS for these facts. I mean you could create multiple LTS (as per your queries of course though) for each of your facts and some combinations of them.
So, whenever there is only one fact table needed to be queried, BI Server can intelligently pick up the correct LTS but do not need to do an unnecessary join between the huge facts.
Hope this helps.
Thank you,
Dhar

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Hi.
I have tried OLAP until now with only one fact table.
But now I have more than one. To start i added one more.
I am always using SOLVED LEVEL...LOWEST LEVEL.
I am always receiving the following error when creating the cube with this measures:
"exact fetch returns more than requested number of rows"
What shall I look for when dealing with more than one fact table?
Thanks.
ODDS
:: ... and still have a very poor performance ...

1.
Well ... I saw the global star schema and we have two fact tables there!!!
Do I have to build different cubes for each fact table always?
2.
I have built cubes, created a java client and a jsp client.
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3.
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ODDS

How we will know that dimension size is more than the fact table size?

how we will know that dimension size is more than the fact table size?

Hi,
Let us assume that we are going to take Division and distribution channel in a dimension and assume we have 20 distinct values for Division in R/3 and 30 Distinct values for Distribution channel .So Maximum, we can get 20 * 30 records in dimension table and we can take rough estimation of records in the cube by observing the raw data in source system.
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Combining more than two movies QT Pro 7.1.5

I know I can combine two movies with QTPro, but how do I combine three?
Thanks
Tom

Hmmm .. that's what I thought. I can drag one to the player window and indeed it will insert at the end of what is already open. It simply will not add the next one.
This is the same behaviour as when I do this:
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2. Put play head at end
3. Open another file in a new player
4. Edit>Select All, Edit>Copy (from new player)
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Thanks anyhow ...
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How can I download to one excel sheet from more than two table?

Hi.
as you know
<SAP_BW_URL CMD='EXPORT' FORMAT='XLS' DATA_PROVIDER='DATAPROVIDER_T1' >
this script can make download excel sheet which is same cotents of table or chart in web template.
but if template has more than two tables how can we get excel sheet from tables?
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Welcome to SDN.
Post this in Business Explorer forum for quicker resposne.
SAP Business Explorer (SAP BEx)
Regards
Raja

Not able to view more than two line in table control

Hi all,
I am not able to see more than two lines in table control. Although my table control height is 21...
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hi,
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data: lv_line type i.
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table_control-lines = lv_line + 1.
or else
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How to specify more than Two Tables in NATURAL JOIN

Hi,
I am using Oracle9i R-2. I want help in writing a Query using Two Tables in SQL*PLUS. I am using ANSI/ISO Standrard for table-joins:
select col1, col2, descr
from tab1 natural join tab2
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How can i use 3rd table tab3 in the same way in Natural Join...? If column col1 & col2 is available in tab3 also.
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select col1, col2
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I do not get an error when I try the same thing on the same version, as demonstrated below. Can you post your table structure and a copy and paste of a run of your actual query with the error that you are receiving?
scott@ORA92> select banner from v$version
2 /
BANNER
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
PL/SQL Release 9.2.0.1.0 - Production
CORE     9.2.0.1.0     Production
TNS for 32-bit Windows: Version 9.2.0.1.0 - Production
NLSRTL Version 9.2.0.1.0 - Production
scott@ORA92> select * from tab1
2 /
      COL1       COL2 COL3
         1          1 A
        10         10 B
scott@ORA92> select * from tab2
2 /
      COL1       COL2 COL4
         1          1 C
        20         20 D
scott@ORA92> select * from tab3
2 /
      COL1       COL2 COL5
         1          1 E
        30         30 F
scott@ORA92> select col1, col2, col3, col4, col5
2 from tab1 natural join tab2 natural join tab3
3 /
      COL1       COL2 COL3 COL4 COL5
         1          1 A    C    E
scott@ORA92>

Retrieval of Data from More Than Two tables

Hi Experts,
How to get the data from more than two tables.
By using Jdbc, and through only core java.
I mean if i entered some empid at command prompt,
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Bye
TulsiRam Mohan.
Message #196971

Is creating view on these 4 tables is an option ?
Something like :
Select * from a
union all
select * from b
... and so on ?

Logical table having more than one Logical table sources

Hi ,
Is it possible a logical table has 2 logical table sources and there is no join between the underlying table of logical table sources?
What will happen if we create the request which contains one attribute from each source?
Will BI server return records with Cartesian join?
Is it mandatory if logical table is having more than one logical table sources(exp. Logical table sources are X,Y and underlying table is A,B respectively),
The underlying tables (A&B) must be joined ?
Can someone explain the logic behind the logical table sources? How does it work?
Any reference of document will be appreciable.
Thanks,Ashish

Hi Stijn,
Thanks for response.
You are saying that Oracle BI server will run a query against both tables and combine the results. But if there is no possibilty of any type of join, how BI server will combine the results from both tables.
I have a scenario like below -
Suppose i have 2 tables A and B at physical layer. Both table contains the information of any common subject area.
But there is no attribute is common between A and B so not any kind of join possible between two.
Now if i create a logical table with 2 logical table source A and B and create any request having one column from A and one from B ,
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How can i model this scenario?

Bridge Table between two fact tables

Hello everybody,
From what I have read on the BI Administration tool help and on this forum, bridge tables are used to define many-to-many relations between dimension sand fact tables. Is it possible to have a bridge table defining a many-to-many relation between two fact tables?
Here is my senario:
1. We have a fact table called fact_Orders describing orders for some products.
2. We have a fact table called fact_Sales describing sales og these products.
3. We have a table describing the transformation from order lines to sales lines which is a many-to-many relation, because it is possible to transform an order in more than two steps.
I was thinking of connecting the two fact tables with a bridge table.
If bridge tables are inappropriate for this case, what could be a better model for my senario?
Thanks for your time.

Hi,
Well a conformed dimension is a bridge table between two facts, so not sure why you need anything else. If there is a one to many from D1 to F1 and a one to many from D1 to F2 then effectively there is a many to many join from F1 to F2 through the D1 dimension.
Sounds to me like all you need is an order dimension table, rows in the orders fact table will join to this dimension and so will rows in the sales fact table. You can then do calculations like number of sales per order, total sales revenue per order, # of order items per order etc etc.
Regards,
Matt

Dimension table is larger than the fact table

Hi Community,
How can we explain the phenomenon when a dimension table has MORE records in it than the fact table ? What are the conditions that would cause this to occur ?
Thank you !
Keith

Thanks, Bhanu,
I am wondering specifically how to explain the output from program SAP_INFOCUBE_DESIGNS when the dimension table is shown to have a fact table ratio that is greater than 100%
I believe that SAP_INFOCUBE_DESIGNS already takes into consideration both the E and also the F-fact table when calculating the ratio. So in this case, we could not explain it by your first suggestion (after compression - but looking at only the F table).
In the case where selective deletions have been performed, how can we correct the situation ? For example, how could we clean out the records in the dimension tables which no longer have any facts in the fact table ? (I think the BW system should do this automatically as a part of the selective deletion, don't you agree ?).
Also, is there any other explanation for how the dimension table could arrive at greater than 100% the size of the fact table(s) ?
For example, lets say that (theoretically) we placed many very dynamic characteristics together into the same dimension.. which we know you should not do. Would it be possible for the combination of these very many dynamic characteristics to cause so many DIM IDs that the dimension table overtakes the record count of the fact table ? Is this situation then made worse by compression if the number of fact table records is reduced thanks to removal of the request ID ?

ORA-01776: cannot modify more than one base table through a join view

I have created EO based on a database view than consists of two tables, and only one is updateable.
When I try to update a row using EO, I got a following message: "ORA-01776-cannot modify more than one base table through a join view"
In Forms, this issue is resolved by setting "Query Only" property of non-updateable items to "True".
Is it possible to do something like that in ADF BC?
Thanks

Thanks for answer.
When I set "updateable" property to "Never", that attribute is protected from any change.
I'm sorry for incomplete usecase.
I have set up a list of value on that attribute, because it is a lookup field for another table and I need to get an ID from that table.
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Edited by: MarioK on Oct 13, 2011 9:28 AM

Data from two fact tables??

I have a report in which I am comparing two fact tables at month level. I have columns calculated at this level.
One fact has all month entries and other does not have all.
I need to show all the month values and measures in the report even if some months donot exist in one fact and exists in the other.
Currently, my report shows only those months which two facts have in common.
Please suggest.

Left join didnot work for me..Still getting the same result.
I created two identical reports from two identical facts.... using "combine with similar request"
Dummied columns from 2nd fact (placed 0s) for 1st report
and dummied columns from 1st fact (placed 0s) for 2nd report.
In the fnal report..
I am getting two rows for each month..
I need to club those two rows into single row by summing up the values..is that possible?
January ..................10 .........0
January...................0............15
February..................3.............0
February ..................0...........-1
I need the out put as..
January.....................10............15
February.....................3............-1

Unexpected results getting data from two fact tables through conformed dim

Hi all,
We are getting an unexpected behaviour in our OBIEE 10.1.3.3.3. We have this scenario:
We have {color:#0000ff}2 fact tables{color}{color:#000000} called F1 and F2. F1 has one measure, f1m1 and F2 has another one, f2m1.
We have {color:#0000ff}4 conformed dimensions{color}, called D1, D2, D3, Date.
When we are requesting for individual fact tables, we are getting:
date d1 d2 d3 f1m1
dt1 - x - y - z - m1
dt1 - x - y - z' - m2
date d1 d2 d3 f2m1
dt1 - x - y - z - m3
dt1 - x - y - z'' - m4
But, trying to obtain a compare scenario, we are getting
date d1 d2 d3 f1m1 f2m1
dt1 x y z m1 m4
Instead of
date d1 d2 d3 f1m1 f2m1
dt1 x y z m1 m3
Looking at query log, we have catched the reason. That's why BI Server is using to solve this request using ROW_COUNT() to join SAWITH0 and SAWITH1 in SAWITH2 result set. So, the order may not be the same in the results sets in every fact table. More or less, generated query is like:
WITH
SAWITH0 AS
(select ....
from F1),
SAWITH1 AS
(select ...
from F2),
SAWITH2 AS
select from (select ...
ROW_NUMBER() OVER PARTITION (....) c10
from SAWITH0.d1 full outer join SAWITH1.d1 ....) D1
{color:#ff0000}where (D1.c10 = 1){color}
select SAWITH2. ....
from SAWITH2
order by c1..c10
The problems seems to be that BI server is ordering the result sets SAWITH0 and SAWITH1 and getting row number to join this results sets, but this is not getting the correct result.
Any ideas?
TIA
Javier
{color}
Edited by: jirazazábal on Mar 13, 2009 2:46 PM

I have done a logical fact table with two fact table source on it.
The Sql performed against the database was this one.
-------------------- Sending query to database named PRODS_AIX (id: <<153418>>):
WITH
SAWITH0 AS (select sum(T21296.CONSUMERS_SALES_EURO) as c1,
     T21309.DIVISION_CODE as c2
from
     DIVISION T21309,
     C_CONSUMERS_SALES T21296
where ( T21296.DIVISION = T21309.DIMENSION_KEY )
group by T21309.DIVISION_CODE),
SAWITH1 AS (select sum(T21356.ORDER_VALUE) as c1,
     T21309.DIVISION_CODE as c2
from
     DIVISION T21309,
     DWH_SALES_ORDER_OVERVIEW T21356
where ( T21309.DIMENSION_KEY = T21356.DIVISION_KEY )
group by T21309.DIVISION_CODE)
select distinct case when SAWITH0.c2 is not null then SAWITH0.c2 when SAWITH1.c2 is not null then SAWITH1.c2 end as c1,
     SAWITH0.c1 as c2,
     SAWITH1.c1 as c3
from
     SAWITH0 full outer join SAWITH1 On nvl(SAWITH0.c2 , 'q') = nvl(SAWITH1.c2 , 'q') and nvl(SAWITH0.c2 , 'z') = nvl(SAWITH1.c2 , 'z')
order by c1As you can see one select (SAWITH0) for the first fact table C_CONSUMERS_SALES and one select for the second fact table DWH_SALES_ORDER_OVERVIEW (SAWITH1 ) and the two statement are joined with a full outer join.
I ask me why you have the three select (SAWITH0,SAWITH1 and SAWITH2). Can you please paste the complete SQL performed ?
Can you tell us also which SQL is performed if you select only the columns from one fact table and not for the other ?
Regards
Nico
http://gerardnico.com

OBIEE 11g - Combine data from two Oracle tables

Good day!
I tried to combine data from two Oracle tables as fact data, but it doesn't work.
My steps: I created SCOTT.EMP2 table from SCOTT.EMP table, update EMPNO and ENAME values of EMP2 table to distinguish data of my tables. Then I imported physical tables DEPT, EMP and EMP2 to BIEE 11g, created joins DEPT-EMP and DEPT-EMP2 in physical diagram. Then I dragged DEPT and EMP tables to BMM, and EMP2 table to EMP as second LTS. In Content tab for EMP and EMP2 I checked "This source should be combined with other sources at this level" checkboxes. Then I renamed logical tables EMP and DEPT to Employees and Departments and dragged them to Presentation area. In Answers I created Analysis with columns DNAME and ENAME.
The problem is that data on results tab is only from one physical table EMP or EMP2 (depending on the order of sources EMP and EMP2 of LT Employees) and not from both.
Can anybody help? Am I missed something?
Al.

Hi Al,
I think you have to define the content of the LTS.
http://download.oracle.com/docs/cd/E12096_01/books/admintool/admintool_BusModSetup16.html
You have to specify the content of the different fragments.
http://download.oracle.com/docs/cd/E12096_01/books/admintool/admintool_SetUpAggNav3.html#wp1005333
Maybe you have to add an additional column 'Source' ('EMP1', 'EMP2')
Good Luck,
Daan Bakboord
http://obibb.wordpress.com

Combining more than two fact tables

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