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Archive for the ‘BISM TAB & MD’ Category

Migration from Time Intelligence Dynamic Named Sets in BISM MD To Tabular Models

Posted by thomasivarssonmalmo on March 27, 2015

If you read my previous post about migration from named sets in BISM MD to an attribute based approach, with current flags, inside the BISM MD model this is pretty straight forward. By the way it works fine with Power View in SharePoint and DAXMD. How do we migrate these named sets in BISM MD to Power Pivot, BISM Tabular with DAX?

The same views as in the previous post should be part of the model.

The Power Pivot Model

This is the model in Power Pivot.

PowerPivotModel

 

To this model you need to add one DAX Time calculation.

ParallelPeriodOrderQty:=CALCULATE(SUM(FactInternetSalesUpdate[OrderQuantity]);SAMEPERIODLASTYEAR(DatesPlus5Y[FulldateAlternateKey5Y]))

Note that the name of this calculation is ParallelPeriod but in DAX we do not use the DAX ParallelPeriod() function. You will have to use SamePeriodLastYear() instead.

Attribute Relations?

No you do not have to think about that. Only add the current flags to the model.

Excel 2013 Pivot Tables with Power Pivot

This is how the report with a current flag set to Y for the Current12Months attribute.

PivotTable

 

What about Power View?

The current flags works fine in Excel 2013 Power View as well. Note the filter set to Current12Months = Y. The row axis is correct and the calculations.

PowerView

 

The model will also work in Power View for SharePoint and DAXMD.

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Update Adventure Works with views

Posted by thomasivarssonmalmo on March 16, 2015

Here are two scripts to create two views in the Adventure Works DW database so that you can play around with current dates instead of having to go back several years.

First the date view:

Create View dbo.DatesPlus5Y

AS

(

Select

DATEADD(YEAR,5,FullDateAlternateKeY) as FulldateAlternateKey5Y,

DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY),GetDate()) as MonthSequence,

DateName(m,DATEADD(YEAR,5,FullDateAlternateKeY)) As MontName,

DatePart(m,DATEADD(YEAR,5,FullDateAlternateKeY)) As MontNbr,

Year(DATEADD(YEAR,5,FullDateAlternateKeY)) as CalendarYear,

Year(DATEADD(YEAR,5,FullDateAlternateKeY))*100 + Month(DATEADD(YEAR,5,FullDateAlternateKeY)) As YearMonth,

Year(DATEADD(YEAR,5,FullDateAlternateKeY))*100 + Datepart(qq,DATEADD(YEAR,5,FullDateAlternateKeY)) As YearQuarter,

Case When DATEADD(YEAR,5,FullDateAlternateKeY) = Convert(varchar(8),GetDate(),112) Then ‘Y’ Else ‘N’ End As CurrentDate,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY),GetDate()) = 0 Then ‘Y’ Else ‘N’ End as CurrentMonth,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY) ,GetDate())between 0 and 2 Then ‘Y’ Else ‘N’ End as CurrentThreeMonths,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY) ,GetDate())between 0 and 5 Then ‘Y’ Else ‘N’ End as CurrentSixMonths,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY) ,GetDate())between 0 and 11 Then ‘Y’ Else ‘N’ End as Current12Months,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY) ,GetDate())between 0 and 23 Then ‘Y’ Else ‘N’ End as Current24Months,

Case When DATEDIFF(MONTH,DATEADD(YEAR,5,FullDateAlternateKeY) ,GetDate())between 11 and 23 Then ‘Y’ Else ‘N’ End as Current12MonthsLY

From [dbo].[DimDate])

 

And then a fact table view. Feel free to add the measures you need. I have added flags for current date, month , year and so on, to replace named sets that do not work in n Tabular and Power View DAXMD.

Create View dbo.FactInternetSalesUpdate

AS

(

Select

CustomerKey,

ProductKey,

DATEADD(YEAR,7,OrderDate) As OrderDate,

DATEADD(YEAR,7,ShipDate) As ShipDate,

DATEADD(YEAR,7,DueDate) As DueDate,

OrderQuantity

From [dbo].[FactInternetSales])

The MD cube or the Tabular model need a Daily process so that the current flags will be accurate. Thanks to MVP Peter Larsson.

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My BI Year 2013

Posted by thomasivarssonmalmo on January 1, 2014

I had too little time to blog as much as I wanted. The one about SSAS evaluation nodes was the one that took me a lot of time to write and it should have a second part with more practical stuff but there was simply no time for that in 2013.

So what happened then? I can mention the word certification.  I took both the 70-463, implementing a data warehouse with SQL Server 2012, and the 70-461, querying MS SQL Server 2012 and I am currently preparing for the 70-462, administering MS SQL Server 2012 databases. The two last ones, from my point of view as a BI consultant, are a waste of time. I am very happy to have passed the 70-463, because it is very useful in my daily work. Parts of the TSQL certification are useful, like 30-40 percent but I would like to see a more BI-focused database engine part with admin and TSQL parts in one exam. Right know both exams are too developer and DBA focused. The goal is to get the MCSA title, since it is mandatory in the company that I work for. It will not make me better as a BI-consultant since I never do cluster installations, Always On installation or set up replication of the database engine. Most of my customers either has outsourced maintenance of hardware and software or would never let me play with their IT-infrastructure. I have colleagues that have these skills and do this work daily.

The parts of BI that have have spent most of my time on, the last ten years, like Reporting Services and BISM MD/Tabular come in the second certification step, to be a “MS Certified Solutions Expert.

Now to the other parts. The year was mostly spent on the ETL or ELT part of BI. I have been involved in name standard document for BI like clening up that the same term applies to different objects or different terms apply to the same object. I was also invloved in discussions with customers about ETL or ELT strategies.

I attended a 5 day long course on the new PDW V2 and that hardware and software solution really can compete on the high data volume scenarios of BI. Do not think about it as only a part of the BIG Data scenarios because it can integrate well with SQL Server environments without the BIG data part. My personal opinion is why you should invest in more than 4 socket CPU system because on the declining return on adding more CPU power. This also questions the Fast Track part of MSBI offerings since PDW V2 gives much better value for money.

I also worked with a POC for a customer that included SQL Server 2012, BISM Tabular, SharePoint 2013 and Excel 2013. The fun part was to load a 340 million record fact table in to  a dedicated tabular server and see that it worked very well and that compression worked to shrink data to 15 percent of the original size.

I met a very smart customer that maintain their own business catalog with product and customer definitions outside of their ERP system. When they upgrade their ERP system they use this business catalog with cleaned product- and customer keys. That is what I call true master data management.

Slowly the interst for more self service is riising here in Sweden.  Since Power Pivot requires quite capable hardware like 64 bit laptops with 8 GB RAM and SSD and Office 2013 that will be an investment for most organizations that requires approval since most laptops are still 32 bit with 2-4 GB RAM. On top of that a SharePoint infrastructure is also needed.  Still the idea that IT provides datasets to users that then use Excel 2013 with Power Pivot and perhaps Power Query is attractive since it will reduce pressure on IT to help with data mash up.

Posted in BI Architecture, BISM TAB & MD, Excel 2013 | Tagged: | 1 Comment »

Alternative to drill through in Excel 2013-Quick Explore

Posted by thomasivarssonmalmo on November 24, 2013

I sometimes get feedback on features from customers that I did not recognized when testing the feature on your own. Quick Explore in Excel 2013 is such a feature.

When we build BI solutions and start to deliver data in a tool customers usually would like to validate the data against referenced transactions in the source system. BISM Tabular and BISM Multidimensional both have a feature for this called drill-through but you have limited control over what will be presented.

I start with a Pivot Table in Excel 2013 that use a multidimensional cube but it will work the same in Tabular. You probably recognize the Adventure Works multdimensional  cube.

StartUpPivotTable

I the next step I will highlight the CY 2005 and United Kingdom cell that tells that the order quantity was 96. You will see a small magnifier glass appear to the right of the cell. That is Quck Explore.

QuickExplore

Qlick on that icon and a small window will open up. I have choosen to go down drill to Internet Sales Order Details –> Sales Order Line to get the reference numbers.

 

DrillToQE

The result might seem disappointing first since we will se all years of order quantity for United Kiingdom not only 2005.

 

UK for all years

This issue can be quickly fixed by moving years from columns in the report to the report filter box.

 

MoveDateToFilters

Finally we have a clean list will the sales order numbers for United Kingdom and the year 2005. It is a clean list without any other redundant information.

 

EndResult

In a Tabular or Multidimensional model you will need to creat a 1-1 dimension with the fact table refered to as a degenerate dimension and in large fact table scenarios this can be a performance problem.

Happy Quick Explore!

Posted in BISM TAB & MD, Excel 2013, OLAP klients | Tagged: | Leave a Comment »