Why Mining Structure Can Only Use One Dimension From A Cube?

Sep 11, 2006

Hi,

I am working with several tables, but for now I just mention 4 : one is fact table (named Usage), and 3 dimensional tables Periods, Products, and Regions. The fact table contains references to the dimensional tables. Table Periods contain two other columns month and year.

I created a cube containing columns from those 4 tables. Deployment was successful. Trouble comes when I want to create a mining structure using Time Series containing these columns :

- Period
- Amount (of money)
- Product name
- Region name

When I choose to use cube (instead of table) as source for mining structure, I'm forced to choose only one dimension (among the Periods, Products, and Regions). Whatever dimension I choose I end up being unable to use the column period as the Time-Key column. Effectively I cannot use Time Series method since I cannot use the column period.

(1) Why is this so [why Visual Studio forced us to use only one dimension from the cube] ?
(2) Why Visual Studio eliminates the column period, column that has relationship with the
time dimension?
(3) What is the use of Cube anyway to the mining? Is there still any use for it?
(4) What is the solution to that kind of problem I face?

Thank you,

Bernaridho

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Data Mining Against A Cube With Time Dimension

Nov 21, 2006

We have a set of cubes and dimensions, and we're experimenting with data mining against the cubes (primarily for forecasting applications). We have a custom time dimension (which we call calendar), not generated by the BIStudio wizard. The dimension has year/month/day/hour/... attributes. But when I try to add this Calendar dimension to the mining structure as a nested table using BI studio, it only shows the Year attribute, not the others. Other dimensions seem to show all the attributes.

Is there something we've done wrong in defining our time dimension? What determines which attributes show up as available for selection in BI studio?

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Oct 18, 2006

Dear friends,

I encounter a serious problem.

I would like to develop an application that can create Data Mining structures and a mining model in SQL Server 2005 with VB.NET. I tried the code from book Data Mining with SQL server 2005 in chapter 14 but did not work. Any good idea?

Please help me.



Best regards,

Manolis

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Create Mining Structure And Mining Model With Code

Oct 20, 2006















Thank you very much for your help.
The errors that I can see in the code that you gave in your answer are the following and they are more or less the same as I had previously

I tried the code but initially I have encounter the following problems.

1. In any line that have the declaration As Server, As Database like in
Public Function CreateDatabase(ByVal srv As Server, ByVal databaseName As String) As Database gives me the problem that type Database is not declared the same type Server is not declared and it does not give me any option.

2. In addition to that for As DataSource, As RelationalDataSource, As RelationalDataSourceView, As ScalarMiningStructureColumn, As DataSourceViewBinding, gives me the problem that type is not declared.

3. Finally in mc = New MiningModelColumn("Yearly income", Utils.GetSyntacticallyValidID("Yearly income", Type.GetType(MiningModelColumn))) is not accesible in this context because it is 'Private'.
I have some more problems but I thing that by solving the above that I referred I will solve the rest.

Thank you any way.
Best regards,
Manolis



PhD student

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Jul 18, 2006

I perform data mining on all products and a specific product category.
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Afterward, I run the Data Mining Wizard 2 times to create 2 mining structures.
I also need to add the same mining model (e.g. Bayes, Cluster) to each of these mining structures.
Is there any simple way to do it?

Thanks.
Joe.

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Nov 27, 2006

Hi ,all here,

Thank you very much for your kind attention.

I just found that I am not able to view the accuracy chart for my mining model. The error message is: no mining models are selected for comparision. Which is quite strange.

Any guidance? thank you very much.

With best regards,

Yours sincerely,

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May 31, 2006

Hoping someone will have a solution for this error

Errors in the metadata manager. The data type of the '~CaseDetail ~MG-Fact Voic~6' measure must be the same as its source data type. This is because the aggregate function is not set to count or distinct count.

Is the problem due to the data type of the column used in the mining structure is Long, and the underlying field in the cube has a type of BigInt,or am I barking up the wrong tree?

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I'm a beginner with SQL 2012 SSDT & SSMS. I get this error message when I try to deploy my project: 

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0 0
"
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Aug 17, 2006

Hi,

I've tried those two operations in the Management Studio.
Though we can create a mining structure and mining model in Management Studion,
but we cannot process the analysis-service database.

(1) I create only a mining structure through CREATE MINING STRUCTURE.
No error reported. But if I process the analysis-service database in Management Studio I always get error

'Error : The '<mining_structure__name>' structure does not contain bindings to data
(or contain bindings that are not valid) and cannot be processed.

I then tried to create it by creating and running an XMLA script. It was successful.
However, it's much harder to learn XMLA.

If any of you created an analysis-service database in Mgt Studio, and create a mining
structure in the same place using DMX script, can you process the database?

(2) Is there any use of CREATE MINING STRUCTURE operation without binding
to any table? Examples I saw so far did not show relating it to do. In my experience
processing the analysis-service database with that mining structure is doomed to fail.

(3) Is there any way we can create mining structure through CREATE MINING

STRUCTURE operation in Management Studio and use RELATED TO clause

to bind it to any Relationship to an attribute column (mandatory only if it applies), indicated by
the RELATED TO clause

(4) If this is the fact, is there any use of CREATE MINING STRUCTURE operation?
If we use BI Dev Studio, it's much easier to use the wizard.

(5) I found I cannot create a mining model inside a mining structure through operation
CREATE MINING MODEL. If you call that operation, you end up having a mining
model and a mining structure with the same name. I found that in order to create a
mining model inside a mining structure you have to call operation ALTER MINING
STRUCTURE ADD MINING MODEL. Is it true this is the only way?

Thank you,

Bernaridho

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May 24, 2007

Hi,



I have 1 report with 2 charts, both charts have their own dataset. The two datasets are mdx queries on 2 different cubes, but some dimensions have the same name.



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So I check in the mdx query builder, both dimensions as parameter, but because both dimensions have the same name, i have only one selectable [dim time] -parameter in my report.



How can i solve this?





Thanks,

Dennis

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Hello,

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Thanks !!!

Cyril.

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Thank you!

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Oct 29, 2007

Hi,

I know, this is a common OLAP Error, but In fact I'm having trouble with this while trying to process a DM Mining Structure.
I'm currently working on a website that gets data from its users and analyzes it using SSAS. The thing is each time we add a new "analysis criterium" (sorry I'm trying to translate our french BI language in English...), we have to build a new mining structure, which needs data about users who have actually answered the question associated with this criterium. Some times, there are thousands, and some other only dozens, which is the case for the structure I'm having trouble with.

I got only 2 hundred tuples in the learning set. So lots of the common criteria weren't filled: I removed them using a stored procedure before feeding the structure, so that I got no column with only "null" values.

Of course, I know that 200 learning cases is really not enough to build an accurate model, but the purpose was just a proof of concept for machine driven Mining Structure building, and that was supposed to work even with so few cases.
When I process the MS, it fires: (Sorry it's in french, translation follows)
Erreurs dans le moteur de stockage OLAP : La cl̩ d'attribut est introuvable : Table : _x0032_0_EtudeIphone_Apprentissage, Colonne : EtudeIphone, Valeur : le nouvel iPhone (t̩l̩phone tactile et musical d۪Apple). Erreurs dans le moteur de stockage OLAP : La cl̩ d'attribut a ̩t̩ convertie en un membre inconnu parce que cette derni̬re est introuvable. Attribut Id de la dimension : 20_EtudeIPhone ~MC-Id de la base de donn̩es : ClassificationVDCE, Enregistrement : 2.


Badly translated it says "Errors in OLAP Storage Engine: Attribute Key not found Table:<StrangeTable> Column <MyPredictableColumn> Value <OneOfTheInterestingValues>
Errors in OLAP Storage Engine: Attribute key not found: converted to an unknown member. Attribute Id from dimension..."

Why? Too few cases? I have structures based on the same template but associated with other criteria and they work perfectly.

I'm ready to answer any question, and give any detail.
Thanks in advance.

François JEHL
IT Consultant
Winwise - Paris




PS: Of course, my "Id' column is unique....

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Can We Define Multiple Key Columns For A Mining Structure?

Jul 10, 2007

Hi, all,

Just found that we are not able to define multiple key columns for a mining structure in SQL Server 2005 Data Mining engine, just wondering is there other way to define multiple key columns for a mining structure there? As in many cases, the table we are mining are with composite key consisting of different foriengn keys, e.g. A fact table are with transaction information and other foreign keys. If I am not able to define these composite key here for this fact table, I will have to have a named calculation in data source view to have a key column which is based on these original composite keys? Is this a better way to solve this problem or there is any other alternatives to figure it out?

Hope my question is clear for your help and I am looking forward to heaing from you shortly for your kind advices and help and thanks a lot in advance.

With best regards,

Yours sincerely,



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Feb 21, 2007

Hello,

Can anyone spot what i am missing here ? The problem is that i am getting a null object for e.TextData in the t_OnEvent(object sender, TraceEventArgs e) function below. I am trying to get event- notifications while processing the data mining structure.

thanks

anil

//-------------code below-------------------------------------

using Microsoft.AnalysisServices;

private void ProcessMiningStructure(MiningStructure mStruct)
{
Trace t;
TraceEvent e;

t = server.Traces.Add();
e = t.Events.Add(TraceEventClass.ProgressReportCurrent);
e.Columns.Add(TraceColumn.TextData);

t.OnEvent += new TraceEventHandler(t_OnEvent);
t.Update();
try
{
t.Start();
mStruct.Process(ProcessType.ProcessFull);
t.Stop();
}
catch (Exception ex)
{

}
t.Drop();

}
//------------------------------------------------------


void t_OnEvent(object sender, TraceEventArgs e)
{
SetText(e.TextData);
}

//------------------------------------------------------







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Hi guys,

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Nov 21, 2006

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Hi, all here,

Thank you very much for your kind attention.

I got a quite a strange problem with Mining structure for OLAP data source though. The problem is: I am not able to edit the mining structure in the mining structure editor. The whole data source view within the mining structure editor is greyed. Could please anyone here give me any advices for that?

Thank you very much in advance for any help for that.

With best regards,

Yours sincerely,

 

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Hi,

I've tried to use the export command to export a mining model from management studio, but it returns that
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Can anyone confirm this?


-Rgds,
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COPY
<Batch xmlns="http://schemas.microsoft.com/analysisservices/2003/engine">
  <Process xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ddl2="http://schemas.microsoft.com/analysisservices/2003/engine/2" xmlns:ddl2_2="http://schemas.microsoft.com/analysisservices/2003/engine/2/2"
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[Code] ...

Errors and Warnings from Response
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[Code] .....

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Hi all,

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