SQL Server Analysis Services (SSAS) multidimensional cube: How to create a role playing dimension?

Standard

Summary:

I was recently asked by a SSAS developer about how to set up a role-playing dimension so I did a brief demo to show how to set it up. In this post, I am document the steps to help you get started:

What is role-playing dimension?

What if you want to see sales data by Order Date as well as Shipped Date? You can one date dimension that is used more than once for seeing sales data by order date and shipped date. In this case, date dimension becomes a Role Playing Dimension.

Steps:

1. Open SQL Server Data Tools and SSAS project that you are working on.

2. Go to Data Source Views from the solution explorer.

3. Make sure that the relationships are specified between dimension (e.g. date dimension) and Fact Table (e.g. Fact Sales). Example: If you’ve OrderDateSK and ShippedDateSK in your fact table, then establish a relationship between the both columns with the Primary Key of the Date dimension.

SSAS Data Source View Role playing dimension

Note: If you do not have the relationships specified in the data source views, there’s an alternative to go to dimension usage for a cube and setup role playing dimensions. since this is targeted to get you started, I am not covering the steps for that.

4. Now go to the Dimensions section in the solution explorer and add a Dimension that uses the existing data source view from step #3.

5. switch to Cubes.

Now, if you don’t have a cube created yet then you can use the cube wizard if you want and as long as you have the relationships specified at DSV’s, it should create a role-playing dimension.

Alternatively, you can also create a new dimension. In the Design pane, lower left section, you’ll see dimensions.

Add Dimensions Cube SSAS

select your dimension that you created in step #4 that’s a role-playing dimension from the list and click on OK. And it creates a role-playing dimension for you! So all you had to do was to make sure the relationships are created between the fact and (role-playing) dimension table and SSAS does the rest of the work for you

SSAS Role Playing Dimension

 

Note: for the demo I didin’t rename the dimension attributes but you do all that good stuff too when you are building the cube for users!

Conclusion:

In this post you got started on how to add a role-playing dimension in a SSAS cube.

How to sort measure values in an excel 2010 based ad-hoc report using SSAS cubes?

Standard

I helped a user today to sort measure values in his excel based ad-hoc report using SSAS cubes & so I’m posting the tips here for note-keeping. There are two ways to do this & here they are:

#1: Select a cell that has a measure value > Right click > Sort > sort the values in ascending or descending from here:

sorting Excel ad hoc report ssas cube#2: Alternatively, you can also do the same thing by: Select a value from the filed that needs sorting > go to Home Tab > Sort & Filter > from here you should be able to sort data in ascending for descending order:

sorting data excel analysis services cube

Conclusion:

In this post, I shared two ways you can sort the measure values in an excel based ad-hoc report using SSAS cubes. Do you allow excel based ad-hoc reporting over SSAS cubes in your organization?

 

How to add calculated measures to Pivot Tables using OLAP Pivot Table Extensions add-in?

Standard

Situation:

Power users in your organization/company are developing Excel 2010 reports against OLAP Cubes. They want to add their own calculations for analysis.

BUT

Excel 2010 does not allow end-users to add their own private MDX calculations.

Solution:

A Free Community Excel add-in helps in this case. It’s called “OLAP Pivot Table Extensions”. Here are the steps to download, Install and use it:

1) Check Excel Version (32-bit/64-Bit)

Open Excel > File > Help> About Microsoft Excel

excel version 32 bit or 64 bit

2) Download OLAP Pivot Table Extensions and Install it

Download URL: http://olappivottableextend.codeplex.com/ > Navigate to Downloads Tab & install the right version based on your local excel version.

In my case, I had 64-bit excel so I’ll download the 64-bit version of OLAP Pivot Table extensions.

Excel Pivot Table Extensions

Close Excel and Install add-in

3) Add simple measure

Open Excel.

Connect to Cube.

Let’s add a simple measure that calculates the difference between two measures.

So I created a simple Pivot Table that looks like:

Excel Simple Pivot Table OLAPNow let’s add a calculated measure:

Select the Pivot Table > Right Click > OLAP Pivot Table Extensions

OLAP PIVOT TABLE EXCEL EXTENTSIONS

On the next screen, please enter the name Difference. and the simple formula:

[Measures].[Meausre1]-[Measures].[Measure2]

(please replace measure1 & measure2 with the measure names from your cube)

And click on Add to Pivot Table

Simple Formula OLAP excel calculated memberYou can now see that the calculated measure Difference got added to the Pivot Table!

Excel olap pivot table with calculated memberNote

1) OLAP Pivot Table extensions is not supported by Microsoft. It’s a community software.

2) To maintain the single version of truth (after all that’s why you create cubes/Data-warehouse’s!), it’s recommended that calculated measures that end users want in the cube.

That’s about it for this post! Your feedback is most welcome!

 

How to add additional Columns to an Existing Table in a Power Pivot Model?

Standard

Problem:

There’s a Power Pivot Model. It imports some number of columns from a table. Now, there’s a need to import an additional column to this table. How do you do that?

Solution:

Here are the steps:

1. Open Power Pivot Model.

2. Go to Design Tab.

3. Click on Table Properties:

Power Pivot Table Properties

4. From here, You can add additional columns:

Add Columns Table Power Pivot5. click on save and that should add the column to your model:

Power Pivot Edit Connections TableFAQ:

#1: I can’t see what you see inside Design Tab. What do I do?

Make sure you have the latest Power Pivot version. You can read this: http://parasdoshi.com/2013/06/04/excel-2010-how-to-check-the-installed-version-of-powerpivot-and-whats-the-latest-version/

#2: How about changing the data source & pointing to new cube/database? It’s very helpful when you switch between QA, Dev or PROD servers. Here are the steps:

you can do that too! Go to Design > Existing connections > Select Connection > Edit > Make changes > Test it! > Save > “Refresh”. Any Problems? No? Great. That’s Done!

Related Posts:
How to add a column in an imported Table while developing SQL Server 2012 Analysis services Tabular Model

How to Parametrize a SSRS report where data source is Analysis services cube?

Standard

In this blog post, we’ll see steps to Parametrize a SQL Server Reporting Services report where data source is Analysis services (SSAS) cube:

Step 1: Let’s say you have reached to a point with your SSRS report where you’ve configured your data source, data sets and data fields that you want to use for your report. For the purpose of this blog post, I’ll be starting with a SSRS report that shows Sales VS country names:

SQL Server reporting services 1

Step 2: Now, let’s say the requirement are such that you want to parametrize the report by a data field in the Analysis services cube: continents

Step 3: Switch to Design View. Now navigate to query designer: Select your Data-set > Right Click > DataSet Properties > Query > Query Designer

ssrs query designer SQLStep 4: Drag the field to the filter area. For the purpose of this blog post, I am going to select Continent Name and add it to Filter area.

To add a field to filter area, there are two options:

#1: Select the field > Right click > Add to Filter

#2: Select the field > use your mouse to drag it to filter area

Step 5: Once you’ve added your desired field to the filter area, we’ll have to add it as parameter.

Now chances are that you are not seeing the parameter check box for this field because the dialog box is minimized. You can either maximize the dialog box or scroll to the right side of the filter area.

Once you see it, check it > click ok

parameter query sql server reporting

Step 6: Once you’re back on Design View. Try “preview” report. you should be able to see the option to select parameter value before the report gets populated with data:

parameter in sql server reporting ssas

I selected Europe and then clicked on view report:

parameter in sql server reporting ssas 2

Step 7: One last thing, Let me also point out how you can change the properties of the parameters.

Go Back to design view > from the report data pane > Expand parameters folders > select the parameter > Parameter Properties

parameter properties report data ssrs ssas

I’ll leave you with exploring what you can do with parameter properties! And with that I conclude this blog post, Your comments are very welcome!

This was a beginner’s level post, I’ll encourage you to follow up by watching three videos here: http://sqlserverbiblog.wordpress.com/2013/12/03/reporting-services-mdx-queries-video-tutorials/

SQL Server Reporting Services: Month Names sorting Issue

Standard

Problem:

I was developing a SQL Server Reporting Services report from data that was coming from Analysis Services cube. And when I created the report having Month Names, it was not sorting it correctly.

It was:

April, August, February, Jan….

But It should have been:

Jan, Feb, Mar…

because I had correct sorting settings in the cube. So what was wrong? Or what can we fix?

Solution:

Turns out, the solution was pretty simple. Here are the steps:

1) Select the chart.

2) Select the Month Name category group

3) Go to Properties

4) Go to Sorting section

And delete the sorting property that sorts the Month Names by A to Z. seems this overrides over sorting properties that’s in the cube.

sorting sql server reporting services month names

5) After deleting the sorting property in SSRS fixs the issue.

Please preview the report to see if the issue has been resolved for you.

Getting Started: Implementing Dynamic Security with row filters in Tabular Models

Standard

In this blog post. I’ll help you get started w/ implementing dynamic security with row filters in Tabular Models.

Scenario:

We’ve users that connect to a Tabular Model via Excel for Data Analysis purposes. One of the analysis that they do is Countries VS. Total Margin:

tabular models countries total margin profit

What we want to do is restrict someone from Europe to see data only about France, Germany and United Kingdom

Solution:

1) Open Tabular Model in SSDT (SQL Server Data Tools)

2) Toolbar > Model > Roles

tabular models BISM roles

3)  Role Manager > NEW > change Name to Europe and Permissions to Read

4) Under the Row Filters, for the Geography Table, enter the following code:

=[Country Region Name]=”France” ||  [Country Region Name]=”Germany” || [Country Region Name]=”United Kingdom”

How to edit code for your scenario? change the [country region name] to your column(s) and also change the values

role tabular dax filter ssdt code

5) Click OK

6) Now let’s test it!

7) Toolbar > Model > Analyze in Excel

8) Select the role Europe

dynamic row filter in tabular models9) Click ok.

10) From Pivot Table, Select Margin & Countries:

DAX tabular models dynamic row filters based on location

11) As you can see, since the role Europe was selected for testing purpose in step 8 –  ONLY France, Germany and UK data is shown in our test! This means that our row filters are working perfectly!

I hope this tutorial helps you get started on implementing dynamic security in Tabular models.

Resource:

WhitePaper: Securing the Tabular BI Semantic Model