Dropping business key from existing dimension

A business key needs to be removed from an existing dimension in a data warehouse.
I couldnt locate any documentation regarding this topic, so please let me know of any links to documentation if you know of any.
Im needing to know if this can be done, or will I need to create another dimension (with correct keys), transfer data,
then swap dimensions in the mapping.
Thanks for any input.

I am sure th business key would be a part of the constaint with which u load the data into the table. So its better u make an analysis of how the data is going to affect the load before u make the change.either create a new one with the correct keys test it for the data and then swap the data or take the existing table, make the changes ,test it in DE?V/SIT and once u r confident it is not affecting the load u can move it to quality and production.
Regards
Bharath

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Referencing two fact keys from one dimension using Dim.Key = Fact.Key1 OR Fact.Key2 possible ?

Hi all
I need your help for an approach to the following problem. Lets say that i have the following dataset
AccountMonth
ActivityMonth
Amount
201307
201301
2.500
201307
201304
600
201307
201305
900
201307
201306
4.000
201307
201307
500.000
201308
201305
500
201308
201307
400
201308
201306
300
201308
201308
400.000
201309
201307
300
201309
201302
500
201309
201309
100.000
201310
201305
400
201310
201309
50.000
201310
201310
200.000
In my cube i want the user to select the Accountmonth from one time dimension, but i want some logic to also apply for the ActivityMonth. For one measure if I for example select 201307 i'll get this amount
AccountMonth
ActivityMonth
Amount
201307
201301
2.500
201307
201304
600
201307
201305
900
201307
201306
4.000
201307
201307
500.000
This is easy - Accountmonth dimension is related to AccountMonth column in the fact table. Now i also need another measure, where the month selected needs to be meet for both accounting and activity month. This is also easy, as i can just reference both
columns in the fact table. Result in this case is then only one row:
AccountMonth
ActivityMonth
Amount
201307
201307
500.000
Now the tricky part comes when I start to select more months, because the amount i need is where month combinations are shared, so if i for example choose 201307, 201308 and 201309 i don't just want
AccountMonth
ActivityMonth
Amount
201307
201307
500.000
201308
201308
400.000
201309
201309
100.000
I actually want the amount from which the months is in either accounting or activity, like this
AccountMonth
ActivityMonth
Amount
201307
201307
500.000
201308
201307
400
201308
201308
400.000
201309
201307
300
201309
201309
100.000
I know how to solve it either by having two time dimensions or using MDX, but user should only have to select from one time dimension. So far, solving it using Non-empty/existing in MDX is not performing fast enough. Feedback will be appreaciated if you
have an idea of how to solve this.

So far, solving it using Non-empty/existing in MDX is not performing fast enough. Feedback will be appreaciated if you have an idea of how to solve this.
here are some links about performance tuning
http://www.mssqltips.com/sqlservertip/2565/ssas--best-practices-and-performance-optimization--part-1-of-4/
http://technet.microsoft.com/en-us/library/cc966527.aspx

No business key column is identified on existing dimension - Slow chg dimension

Hi,
I m working to insert/update my Dimension table (in datamart) using SSIS "Kimball Method SCD component " tool.
I have different columns as PK in source and identity column as PK in Dimension table.
I also have Unique Index on the columns in dimension which are PK in source table yet I m getting error from the tool that "no business key column is identified on existing dimension"
Any suggestions?
Thanks,

Business key needs to be defined in the component tool itself.
Double click the component and it will open a wizard kind dialog box.
The first tab is "Existing Dimension Input Column Definitions".
In this tab, the grid has a column "SCD Column Type" which looks like label field but if you click it twice, it turns into dropdown list and from here, you can define Business key for your dimension table.
HTH

Dimension table, indexing business key

Hi.
I my dimension table business key is Unique key constraint and business key is also a index key (unique).
My question is why is important for dimension to have index?
In my mapping I first load data into dimension and to merge data I use business key. Ok, business key is unique so I'm merging by constraint (UK).
I have a fact table mapping where I use previous dimension for lookup, and I do lookup by a business key.
I understand why we have index in fact tables, but in dimension?
When and why does business key index help me?

Hi,
There are many reasons why we use indexex on dimensions.
1) The source key or natural key may or may not be a unique one in case of SCD2 and hence its faster to look up w.r.t the index key rather than the source key.
2) It is not a good idea to have all the source keys from ur dimensions in ur fact. We have to have the index keys anyway to speed up the process of quering.
3) The index key is always unique and so u will always land on only 1 record on any look up
Regards
Bharath

Loading data into Fact/Cube with surrogate keys from SCD2

We have created 2 dimensions, CUSTOMER & PRODUCT with surrogate keys to reflect SCD Type 2.
We now have the transactional data that we need to load.
The data has a customer id that relates to the natural key of the customer dimension and a product id that relates to the natural key of the product dimension.
Can anyone point us in the direction of some documentation that explains the steps necessary to populate our fact table with the appropriate surrgoate key?
We assume that we need to have an lookup table between the current version of the customer and the incoming transaction data - but not sure how to go about this.
Thanks in advance for your help.
Laura

Hi Laura
There is another way to handling SCD and changing Facts. This is to use a different table for the history. Let me explain.
The standard approach has these three steps:
1. Determine if a change has occurred
2. End Date the existing record
3. Insert a new record into the same table with a new Start Date and dummy End Date, using a new surrogate key
The modified approach also has three steps:
1. Determine if a change has occurred
2. Copy the existing record to a history table, setting the appropriate End Date en route
3. Update the existing record with the changed information giving the record a new Start Date, but retaining the original surrogate key
What else do you need to do?
The current table can use the surrogate key as the primary key with the natural key being being a unique key. The history table has the surrogate key and the end date in the primary key, with a unique key on the natural key and the end date. For end user queries which in more than 90% of the time go against current data this method is much faster because only current records are in the main table and no filters are needed on dates. If a user wants to query history and current combined then a view which uses a union of the main and historical data can be used. One more thing to note is that if you adopt this approach for your dimension tables then they always keep the same surrogate key for the index. This means that if you follow a strict Kimball approach to make the primary key of the fact table be a composite key made up of the foreign keys from each dimension, you NEVER have to rework this primary key. It always points to the correct dimension, thereby eliminating the need for a surrogate key on the fact table!
I am using this technique to great effect in my current contract and performance is excellent. The splitter at the end of the map splits the data into three sets. Set one is for an insert into the main table when there is no match on the natural key. Set two is when there is a match on the natural key and the delta comparison has determined that a change occurred. In this case the current row needs to be copied into history, setting the End Date to the system date en route. Set three is also when there is a match on the natural key and the delta comparison has determined that a change occurred. In this case the main record is simply updated with the Start Date being reset to the system date.
By the way, I intend to put a white paper together on this approach if anyone is interested.
Hope this helps
Regards
Michael

How to create BP from existing vendors optionally?

Hi,
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Does the vendor synchronization (Cross-Application Components - Master Data Synchronization - Customer/Vendor Integration) mean that a BP is created for each vendor in the specific account group?
I've tried to define the configuration settings but haven't found the solution for this yet. Please advise.
- BP grouping assigned to number range
- one FI account group is assigned to BP grouping
- BP role (BP role category, BP view) defined
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Thanks!

Hi,
thanks for your comment. I need to check this option too.
However, in this case this does not seem like the best option regarding the workload of users. If they have already xxx vendors in FICO, it does not seem like a very efficient way to create those first also as BP, and then link these records.
It would be much easier to only create the BP based on vendor data with FLBPC1, and save the double work.
Based on SAP documentation, I've understood that FLBPC1 Create BP from vendor is meant for this purpose, so I would like to use this option.
Please advise. Has anyone used FLBPC1 Create BP from vendor successfully?
Thanks!

Create a new dimension in business layer from Data source: text file on the web

Hi,
I have a text data source which is published every few hours that is accessible from a certain URL. I follow the instruction given in this http://scn.sap.com/docs/DOC-43144 - where it shows in great detail how to create the connection, data foundation as well as business layer to create a universe for this type of data.
All is well - I can use this universe in my WEBI doc and display the data.
However, in order for me to merge the data from this universe with another universe, I need to create new dimension based on the data from the text file. The new dimension value is simply the first 4 characters of the Subject found in the text file. The "Subject" dimension is of variant type: varchar.
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So here are my problems
1. one of my data source is a text file published on a web
2. the only connection I can create does not allow me to create new dimension in the universe to create an important column "subject ID"
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I'm using WEBI Rich client version 4.1 SP3 Patch 1. Build 14.1.3.1300
Is there any other idea that you can suggest without requiring to change the extracted data?
Thanks.
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Hi Bala,
Were you able to find out a solution for the problem with uploading values for a variable from a text file on the web? I am confronted with the same request from users.
Thanks,
BQ

Distinct count of dimension business key in fact table

In my cube I have a fact table which joins to a patient dimension. The patient dimension is a type 2. What I would like to do is get a distinct count of patients who have records in the fact table. The business key in the patient dimension
is the PrimaryMrn. So a SQL query would look like this.
SELECT count(distinct PrimaryMrn)
FROM EncounterFact e
INNER JOIN PatientDim p
on e.PatientKey = p.PatientKey
Is it possible to do this via MDX?
Thanks for the help.

If you have to distinct count an attribute in a SCD 2, you might choose between:
Denormalizing that attribute in the fact table, and the create a classical DISTINCT COUNT measure
Use a many-to-many approach - see the "Distinct Count" scenario in the Many-to-Many White paper here:
http://www.sqlbi.com/articles/many2many (for both Multidimensional and Tabular
If you use Tabular, you might want to read also this pattern:
http://www.daxpatterns.com/distinct-count/
Marco Russo http://www.sqlbi.com http://www.powerpivotworkshop.com http://sqlblog.com/blogs/marco_russo

How to load composite business key into Dimension

Hi,
Maybe what I'm asking is very basic but, well, here I go:
I have a dimension, CollectingAgent, and several tables to populate from:
Bank (bank_code, bank_name ) [PK: bank_code]
Agency (bank_code, agency_code, agency_name, address, etc) [PK: bank_code, agency_code]
Now, for my purposes, collecting agent is the bank+agency descriptions concatenated. I don't know hoy to load, or map, the combinated key (bank_code, agency_code) into the business field of the dimension. OWB won't let me define more than one attribute as business key.
I'm using OWB 10g Rel2.
Thanks in advance for your help,
--oswaldo.
[osantos]

Ok, let me try to give an example made up with completely bogus information. I'm going to make a dimension called clothing that has two hierarchies that look like this:
"Item" hierarchy:
All Clothing --> Item Type --> Color / Item
"Color" hierarchy:
All Clothing --> Color --> Color / Item
Item type would be values such as pants, shirts, dresses, etc. The low level "color / item" is just a combination of those two (i.e. "Blue Shirt") - and note in this example that it will have 2 composite natural keys. It will roll up over the item type hierarchy under shirts, and under the color hierarchy in blue. Here's a sample of what I'm talking about:
(Item hier)
All Products
...Pants
......Blue Pants
......Red Pants
......Green Pants
...Shirts
......Blue Shirts
......Red Shirts
etc.
(Color Hier)
All Products
...Blue
......Blue Pants
......Blue Shirts
...Red
......Red Pants
......Red Shirts
like I said, completely bogus, but this will let me illustrate how to set up the dimension. I'd create the following attributes (hard to format, sorry):
Key....................Surrogate Key
ID.......................Natural Key
Item_Type_ID......Natural Key
Color_ID..............Natural Key
Short_Desc.........short description
Long_Desc..........long description
Having created these attributes, I'd then create the following levels and assign the attributes as follows:
All_Products_Level:
...Key
...ID
...Short_Desc
...Long_Desc
Item_Type_Level:
...Key
...Item_Type_ID
...Short_Desc
...Long_Desc
Color_Level:
...Key
...Color_ID
...Short_Desc
...Long_Desc
Color_Item_Level:
...Key
...Color_ID
...Item_Type_ID
...Short_Desc
...Long_Desc
Should be pretty easy from there. The whole trick is to have a SERIES of different natural keys - a "generic" one (ID) for dimension levels you don't really care about, and "named" ones (color_id, item_type_id) you can use for given levels. And note that you CAN have more than one natural key at any level, and you can have some natural keys that are not used at all levels.
For your simple dimension, you can probably do the following (note that I'm assuming the lowest level has your composite two business keys, while the top level is completely separate):
TOP_LEVEL:
...Key (for the surrogate key)
...ID (for the business natural key)
...Short_Desc
...Long_Desc
BOTTOM_LEVEL:
...Key (for the surrogate key)
...Business_natural_key_1 (rename to be match your first business key)
...Business_natural_key_2 (rename to match your second business key)
...Short_Desc
...Long_Desc
Hope this helps! If you need to see something a little more concrete, feel free to email me at SPowell at columbus.rr.com, send me some details on exactly what your keys are, etc. and I'll whip up a quick example for you.
Thanks,
Scott

Web Matrix FTP Remote Connection Error - "Connection Error - Failure to get file list from server. An entry with the same key already exists."

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Can I create a foreign key when creating Business Components from Tables

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When I create a "Business Component from Tables" view, can I put in my own joins between tables so enabling the use of the generated views?
Jon L.

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http://www.oracle.com/technology/products/adf/learnadf.html
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How to get Exchange 2010 Product Keys from an existing installed servers

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Hi,
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How to Drop an index from a used table. online

I need to drop an index from a table that is constantly used , read and write.
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Hi,
or if your lowest level is the same like
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D

Dropping business key from existing dimension

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