Analysis :: Role Playing Dimension Among Multiple Fact Tables
Oct 28, 2015
I am modelling cube in SSAS. Cube has around 20 dimensions and 6 fact tables. Some of the dimensions are common among the fact tables. e.g. Time dimension. Fact_PNL has 3 date columns for those we have 3 role playing dimensions in the dimension usages.
Another fact table has 5 date columns for them as well we have separate role playing dimensions in dimension usage tab. We have a common dimension Company which is foreign key in all fact tables. We might need to combine the data from multiple facts to get final output.
Should i create 6 role playing dimension for each of the fact table or use the same dimension for all fact tables?
Role playing dimensions should be created when we have multiple columns pointing to the same dimension ?
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Dec 25, 2007
how to create a role playing dimension in SSAS. Like If I have a period dimension table with a key named as per_key and fact table which has keys named as from_per_key and to_per_key .Now both the fact table keys need to be connected to the Period dimension per_key.
gunja
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Jul 10, 2007
Hi, dear friends,
Just found that I am not able to ignore the name column property for role-palying dimension even though I only select one of the key columns for this dimension in the mining structure where the role-playing dimension is used? E.g I have a fact table (which is the case table for the mining structure) which is related to the role-playing date dimension. The schema is as following:
Dim_event_day_time_key
Dim_carrier_day_time_key
Dim_domain_day_time_key
.....................................
and other attibutes in the fact table.
When I dragged the 'hours' attribute from the dim_day_time table to the mining structure, if I left the key columns of 'Hours' as the above 3 columns, then I have to select a name column, by then I dont have a name column in the dimension table yet. Therefore I want to jsut select one key column as the key of that role-playing dimension in the mining structure, but then I am not able to ignore the 'name column' property as it still always asks me to select the 'name column' for that.
Therefore my question is: we are not allowed to select only one key columns in the mining structure for the role-playing dimension? And we will have to always go to the data source view to create a named calculation as the new column for the role-playing dimension?
Hope my question is clear for your advices and I am looking forward to hearing from you shortly.
Thanks a lot in advance.
With best regards,
Yours sincerely,
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Mar 19, 2012
I am developing a BI solution on SQL Server 2008 R2 and how to handle multiple referances to the same dimension from a fact table!
Here is the scenario;
Fact_Contracts (# M)
ServiceProvider_CompanyID, Client_CompanyID, Amount_USD
Dim_Company( hundreds)
ID, CityID, ProfessionID, CompanyName
Dim_City
ID, CityName
Dim_Profession
ID, ProfessionName
As u can see there is two company references in my fact table, and the schema is in snowflake. My customer requirements state that the Contracts' amounts can be aggregated/filtered for/by, ServiceProviderCompany, its city/profession or ClientCompay, its city/profession.
First thing came in to my mind is to dublicate whole dimension structure (one for serviceproviders, one for clients), which i thought that there should be another way around?
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Jul 28, 2015
I have a requirement to set Description values for our cube dimensions and attributes.
I've done this for regular dimensions but I cant seem to find a way for role playing dimensions. I can set the base dimension descriptions but not the 'clones'. Is this possible?
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Aug 11, 2015
I am working on a model where I have a sales fact table. Each fact record has four different customer fields (ship- to, sold-to, payer, and bill-to customer). I have one customer dimension table that joins to the sales fact table four times (once for each of the customer fields above). When viewing the data in Excel, I would like to have four hierarchies (ship -to, sold-to, payer, and bill-to customer) within Customer.
Is there a way to build hierarchies within my Customer dimension based on the same Customer table? What I want is to view the data in Excel and see the Customer dimension. Within Customer, I want four hierarchies.
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Nov 18, 2015
I'm currently setting up a Tabular Model to do some research between several fact tables. In this example i have two fact tables (table 1 and table 2) which I've created a 1 to 1 relationship on phone number. Typically I create a relationship between these tables to find common data between the two. However, in this case I am trying to figure out the best way to model the data so that I can easily surface data from one table that does not exist in the other. I would liken this to a LEFT JOIN or a WHERE NOT EXISTS in SQL.
Table 1 has all of the data and Table 2 Only has a subset of the data from Table 1. What I'm trying to do here is display what attributes in Table 1 may play a part in records not existing in Table 2. What is the best way to model this?
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Dec 2, 2015
I've got a dimension built from a fact (whatever that's called?) ... it's a date interval field, i.e. 0-5 weeks, 6-10 weeks 11+ weeks. How do I sort these members in the respective order? Looks like this currently:
The problem lies in the fact that I don't have any secondary attributes to order it by, i.e. it's not a physical dimension where I can use a key for the 3 members. I was hoping I wouldn't need to create a separate dimension to get round this.
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Feb 24, 2011
I am using sql server 2005 enterprise edition.
How to list all the dimension and fact column names with mdx or tsql query...
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Sep 6, 2011
I have a Fact table that contains several degenerate string values that I have pulled into a Fact Dimension.
When I browse the cube and cut one of the measures by an attribute from the Fact Dimension, I am getting incorrect data.
In other words, when I query the fact table directly via SQL and apply the same filters, I see the data I am expecting to see. But cube browse with same filters yields different results.
How can this happen since the fact dimension has a 1:1 relationship with the fact table.
I do have the Dimension Usage configured properly.
Is this an aggregation thing? Attribute key thing? What am I missing?
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Feb 6, 2008
Hi All,
What is the best way to move data from Online system tro data warehouse?
I have created 3 dimension tables(product,date and customer tables) and
I wanna create fact table and get foreign keys from dimension tables.
What is the best method to do that in SSIS?
thanks
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May 16, 2007
Hi,
I am new at SSIS and I am trying to create a Datawarehouse using SSIS. I have the data files as flat files I have the Dimensional Model ready on Paper and Now I need to use the SSIS for the ETL process.
I am trying to figure out how to make dimension tables in SSIS? I mean I want to create the 5 Dimension tables and then create a Fact table out of it but I cant understand where to start? Can any one tell me how we create Dimesion tables in SSIS. Like one of the dimesion tables I need to create uses 2 flat files and is like a flattened dimension, How would I create this in SSIS?
Even if there is any tutorial which shows this step by step do let me know. I would really appreciate any guidance on this.
Thanks,
Sarang
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Dec 17, 2007
Hi there, my question is really simple. I want to setup an automatic task in SSIS that drops the tables in the target database and substitutes them with tables from the source database. We are talking about two or three dimension tables and one fact table. The dimension tables are pretty small. The fact table will contain, at maximum, 300,000 rows and 12 columns. I do not use delta or flag historisation btw. What tasks in SSIS would you suggest to use?
BTW I'm new to SSIS... ;-) Thanks in advance!
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Sep 22, 2006
Hi ,
I have situation where I get data from SRC Flat file and have to load Dimensional table and also fact table, using same data flow(have no other choice since I have to unpivot some src data). Since I have to load both tables in same data flow, I have to have a way to put load ordering constraint (I know informatica allows that). Does any one have any idea on how this can be done in SSIS?
I would be really grateful.
Thanks
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Jun 10, 2014
I created a Fact Table with 3 Keys from dimension tables, like Customer Key, property key and territory key. Since I can ONLY have one Identity key on a table, what do I need to do to avoid populating NULLs on these columns..
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Sep 11, 2015
How do I correctly populate a fact table with the surrogate key from the dimension table?
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May 29, 2008
Hi,
I was wondering if anyone had come across an issue where the icons in the dimension usage tab of the cube are not being displayed properly, for example if you use a many-to-many the little blue infinity sign is missing. It is a little annoying.
SP2 with BIDS helper, not to sure if BIDS helper did it or SP2, sure it was fine before
Anyone know how to fix it?
Cheers
Matt
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Jul 15, 2015
I am modelling two fact tables of Actuals and Budget which are at different granularity, Actuals are at day, customer and product sub category level. Budgets are at month, Region and Product category level.
Month, Region and Product Category is present in Date, Region and Product Category dimension respectively. I have only three dimensions as Customer, Product and Date. Linking those dimensions to Actual Fact table is not an issue, what is the best way and options are there to link budget fact table to those three dimensions.
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Jul 6, 2015
I built my first tabular model and see that my fact tables are also appearing as dimensions. In Multi dimensional mode i could choose which are the dimensions. How do i do that in tabular model.
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May 29, 2015
Link : [URL] .....
This provides a good example for my situation. In this example, you will see a Movie dimension with four attributes; Genre, Language, Movie, and Theme. I have a similar setup except mine is Top Level Hierarchy>Categories>Values which are all under the one hierarchy.
My Question: I have the dimension setup as a multi-value parameter in one of my reports. When I filter on a value in Genre and in Language, it provides all values from that genre and all values from that language. I really only want the values that include both.
Genre - Western: Movie1, Movie2, Movie3
Language - English: Movie2, Movie4, Movie5
If I filter on Western and English, I get Movie1-5 when all I really want is Movie2 only. Is there any way to have this do an Intersect within the same dimension or do I have to build each one out into its own dimension?
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Oct 26, 2015
When i add a dimension to the cube dimension without any relation in my dimension usage to any measure group my units are going down.However when i remove the dimension from the cube am getting the correct values.
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Jun 2, 2015
I have a dimension report with an attribute reporttype which have different member let say A,B,C,D....etc.
I want to set more than one default members for dimension report.
I've read all about how dimensions can have only one default member, but I need to set more than 1.
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Oct 13, 2015
How @StartDate and @EndDate parameters must added to the MDX query for usage in SSRS data set. strtomember can be used like
SELECT (
strtomember(@StartDate) : strtomember(@EndDate)
) ON COLUMNS FROM [Cube]
How can i specify that sub-select must work on the [Fact A] and [Fact B] rundate? strtomember(@StartDate) does not specify on which attribute this sub select is going to work. Any pointers ?
FROM
(
SELECT
(
[Fact B].[Rundate].&[2015-01-02T00:00:00] : [Fact B].[Rundate].&[2015-01-15T00:00:00]
) ON COLUMNS FROM
(
SELECT
( [Fact A].[Rundate].&[2015-01-02T00:00:00] : [Fact B].[Rundate].&[2015-01-15T00:00:00] ) ON COLUMNS FROM [Cube]
)
)
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Jan 19, 2006
Greetings,
Iam new to SQLl2005. Iam using DTS to transfer data from my source to the warehouse. I have a couple of tables in my source whein I have to join these to tables fields and insert the same in teh warehouse fact table. I have used a Join query in my Oledb source component, What other component needs to be used to insert the data into the fact table.
I also need to extract same data with aggregation and insert the same into an another Fact table.
Kindly help.
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Apr 28, 2008
Hi all,
Apologies if this has been raised in the past, but 6 hours of web searching today hasn't turned up anything!
I'd like to use the Slowly Changing Dimension (SCD) Wizard to keep track of tables in my relational database. This means 200+ tables. I don't want to step through the UI Wizard for each table. Ideally I'd like to be able to create the SCD transformation in code, but I can find no good examples for doing this. The MSDN examples here are too brief and don't allow me to expand out to the level I need.
As in any database, columns come and (very rarely, go), and having a programmatic solution to this would mean that I could be flexible and cope with these situations.
So, my question is: Has anyone implemented SCD functionality in code, or have any code examples that do this, that I might learn from. Or, any tips/pointers if I'm barking up totally the wrong tree.
Thanks in advance,
-tom
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Sep 12, 2007
A few questions:
1) We have numerous fact tables with surrogate keys which reference just one dimensional surrogate key. How does this work?
2) Are the ‘facts’ feeding data TO the ‘dimensions’ (back end warehousing)? Or are the ‘Dimensions’ feeding facts to the ‘facts’ tables for lookups!?
Nb: Im very inexperienced at database design.
Im really also using this thread to get contacts for future harder questions!
Thanks kindly
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Feb 13, 2008
I have a fact table that has terminations. Fields include EmployeeName, TermDate, TermReason, and HireDate, et al.
I need to make EmployeeName available to drillthrough, and since it's a varchar field I can't make it a measure, so it has to be a dimension attribute. My question is, should I leave the fact table as it is and use SSAS to create a dimension that contains only EmployeeName and the link to TerminationID? Or should I redesign the OLAP tables so that EmployeeName is in a separate table?
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May 7, 2008
Dear all,
Now I create datawarehouse for my client, I have SSIS a lot for ETL process, I a problem that some fact table need to be updatetable and there is a lot of data of this, I need some efficent way to load this data to data warehouse.
I have read your article about SCD in SSIS (Slowly Changing Dimensions in SQL Server 2005).
I think the purpose of SCD for Dimension table. If I have some fact table that need rows to be updatetable can you give me an example, best practice, the efficient way or fastet way to load fact table that can be updatetable?
If you have link or link about this problem please reply my email. Thanks
My datasource from ORACLE and my datawarehouse in mssql2005
Regards,
Hendrik Gunawan
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Dec 19, 2014
I have a fact table with few flag columns.
What is the best way to bring them to dimension?
Do I need to create dimension(dummy) from fact table for each flag or all flags in single dimension?
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Aug 15, 2007
I'm putting together a Kimball method SSIS package. My factSales table has an OrderRep key. If a match isn't found in the dimRep table I am inserting a dummy dimRep row and going on. That seems to be working.
My question is what do I do when the OLTP sales row has NULL for the OrderRep. This is possible; every sale does not have to have an order rep. My package is seeing that as a non match and trying to create a dummy row in the dimRep table for every NULL. I really don't want to do this. I can trap for the NULL rep and convert it to "unknown" or something but then the program would still create a single row in the dimRep table for unknown. Is that the best way to handle this? Or is there a way to trap for NULL and ignore the entire lookup process? A conditional split before every key lookup?
I have about 5 or 6 other dimension tables that will have the same NULL possibility.
Thanks.
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Aug 25, 2006
Hi All,
I am just curious to know how I can load data from a data warehouse to an Analysis Service Cube (both to the fact tables and dimensions).
Does any body have some way to achieve this?
I appreciate if any body provide me a good material which describe this scenario.
Sincerely,
--Amde
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Jul 27, 2007
I'm loading a fact table that has several geographic attributes - some are at the state level, some are at the county level, and then some are drilled farther in that that. I understand the basic concept of the dimension with the ragged hierarchy, but unsure of how to load to the fact table using lookups based on these geographic units. For example, if my geographic dimension contains 200 records for the state of Wyoming, basically a record for each fine-grain place (i.e. city/town), then how do I go about doing a county lookup. Wyoming only has 23 counties, but because of the repetitive nature of the dimension attributes that are not at the finest grain, I'll get more records in the lookup than I need. This activity repeats of course while I move up the geographic scale to state, then country. How do I configure/fill my dimension to handle these differing scales of data?
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Oct 26, 2015
Say you have a fact table with a few columns that all reference the same key column in a dimension table, you want to write a view to return the information for those keys?
USE MyTestDB;
GO
SET NOCOUNT ON;
IF OBJECT_ID ('dbo.FactTemp' ,'U') IS NOT NULL
DROP TABLE dbo.FactTemp;
[Code] ....
I'm using very small data at the moment, and the query plan and statistics don't really say which way.
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