Category Archives: Business Intelligence – BI

Power BI Enterprise Gateway, Everything You Need to Know

Power BI Enterprise Gateway is release awhile ago (2 Dec. 2015), but, with the latest release on 22 Dec. 2015 Power BI Enterprise Gateway now supports live connections to both SQL Server Analysis Services Multidimensional and Tabular models as well as SAP HANA. In this post I’ll explain lots of important aspects of the Power BI Enterprise Gateway including installation,  configuration for different data sources including SSAS Multidimensional, Tabular and SQL Server Database and much more. If you need to have the lowest possible latency then you need DirectQuery/Explore Live feature on top of your on-premises data sources. The good news is that Power BI Enterprise Gateway now supports all following data sources:

  • SQL Server Database
  • SQL Server Analysis Services Multidimensional
  • SQL Server Analysis Services Tabular

    In this article you’ll learn how to install and configure Power BI Enterprise Gate Way, how to manage different live data sources, how to create reports on top of live data sources and more.

  • Note 1: If you want to use DirectQuery to connect to your on-prem SQL Server Database OR Explore Live your SQL Server Analysis Services Tabular model then you might not need to install and use the Power BI Enterprise Gateway. In those cases you can install Power BI Personal Gateway to connect to an instance of SQL Server OR install Power BI Analysis Services Connector to connect to your on-prem instance of SQL Server Analysis Services Tabular model rather than installing the Power BI Enterprise Gateway. But, bear in mind that selecting the best gateway is really depending on your use cases, your data sources and the environment you’re working on.

  • Note 2: The Power BI Enterprise Gateway and Power BI Personal Gateway CAN be installed on the same machine.

    Downloading and Installing Power BI Enterprise Gateway

    You can download the gateway from Power BI website when you logged in to your account and click on “Power BI Gateways” from the download menu:

    Downloading Power BI Enterprise Gateway

    OR you can go straight to the gateway page then download the Power BI Gateway – Enterprise (Preview):

    Direct Link to Download Power BI Enterprise Gateway

Continue reading Power BI Enterprise Gateway, Everything You Need to Know

Querying SSRS Report Definition Using T-SQL

Do you want to have all reports that used a table in their report definition?

Are you looking for a report that has a desired parameter name?

Have you written a new version of a SQL view or stored procedure and you need to modify all the reports working on top of the version of the object, but, you don’t know what those reports are?

Have you modified an SSAS object and you need to know which reports might be affected?

If you have any of the above questions or in general you need to retrieve all SSRS reports which have a specific string in their report definition, just connect to the SQL Server instance which holds your   REPORTSERVER database through SSMS and simply execute the SQL scripts below:





            AND  C.TYPE = 2




Browsing Cubes Remotely from Excel Trough a VPN Connection without Using Windows Authentication

Technically when you connect to another network through a VPN connection you can see all allowed machines on that network. So it is easy to connect to a SQL Server instance using SQL Server authentication. However, I’m explaining this part for some of you guys that might be new to connecting from Excel directly to a database on SQL Server and create flashy reports on Excel.

But, what about connecting directly from Excel to a remote Analysis Services instance without using Windows Authentication? You’re right! I’m saying you can connect directly from your own Excel to a remote SSAS server without using windows authentication. Well, technically there is no SQL Server Authentication mode available for Analysis Services. So what does that actually mean when I say “without using windows authentication”? If you’re interested in finding the answer keep reading this article.


You’re working as a BI consultant, you’ve been told that a client needs to have some simple reports on Excel as follows:

·         You should connect to the client’s server using a provided VPN connection

·         The VPN connection could be established through a Windows VPN, Cisco VPN etc. so the VPN client or the port and protocol used don’t actually matter

·         Microsoft Excel is NOT installed on the client’s server

·         You’re NOT allowed to install Excel on the server

·         As it is a costly process the client will not setup a virtual machine in their network so that you can remotely connect to it and install Excel then connect to their SQL Server/Analysis Services instances

·         There is no trust relationship between your network and the client’s network, so your domain user name and password could not be authenticated on the client’s network

·         The client needs to have some reports on Excel on top of a SQL Server database and OLAP cubes on Analysis Services (SSAS)

·         You have the right to run an application as administrator on the remote server

·         You need to connect to the remote server directly from your own Microsoft Excel installed on your machine

·         The client also provided a remote desktop access to the server

·         On the remote desktop SQL Server Management Studio (SSMS) is installed

·         In the remote SQL Server your account is a member of the “securityadmin” server role so you can create a new SQL Server Login

Continue reading Browsing Cubes Remotely from Excel Trough a VPN Connection without Using Windows Authentication

An Easy Way for SSAS Batch Processing

Batch processing is available in Analysis Services. Which means we can send multiple processing commands to the server in just a single SQL Server Job. With SSAS batch processing we can control which objects to be processed and in what order in a batch.  As batch processing reduces the amount of time taken to commit changes it offers better data availability. We can easily generate XMLA codes  for batch processing through SSMS (SQL Server Management Studio). You might see lots of discussions about this in other websites and lots of them are saying you need to right click on the objects one by one and generate the scripts. Then put all scripts together in another XMLA script. But it is such a pain when you have lots of objects that should be selected one after another to generate the batch processing XMLA. Sadly, it is not the end of the story. You need put all scripts together by copying and pasting the scripts several times. Today I want to show you a very easy to the job which saves lots of your time.

I’m using “Adventure Works 2012 Multidimensional” as an example and I’m going to batch process some dimensions.

  • Connect to the SSAS server from Management Studio
  • Expand the database
  • Expand dimensions


Continue reading An Easy Way for SSAS Batch Processing

Role-playing Dimension in SSAS Tabular Models

First of all I’d like to explain what a Role-playing dimension actually means. Then I’ll express the way you can implement it in a SSAS tabular model.

When you link a dimension to a fact table several times for logically distinctive roles you’re using a role-playing dimension.

The key points are:

1.       You are linking a fact table to a dimension multiple times. The relationships are defined by linking multiple foreign keys in the fact table to a single key in the dimension table.

2.       Each linkage represents a single role or concept

The most popular role-playing dimensions are DimDate and DimTime.

NOTE: The sample is from Microsoft “AdventureWorksDW” for SQL Server 2012 and might be different from your own data warehouse design.

For instance, in a sales system that you have something like FactInternetSales fact table which has several links, or relationships, to a DimDate or DimAddress for distinct concepts like “Order Date”, “Ship Date” and “Due Date”.

As you see, all of the above columns obviously represent different meanings of date. In the data warehouse design you’ll see something like this:

role-playing dimension 01

Although this is absolutely OK in the relational database layer, but, this sort of relationship is NOT permitted in the tabular model, so what should we do?

Continue reading Role-playing Dimension in SSAS Tabular Models

How To Implement a Composite Key In SSAS Tabular Model

As you might know SSAS tabular models do not support composite keys so you always must have just one column to make a unique row through the whole table. This is such a pain especially when you are new to the tabular models and don’t have that much detail information about it. So when you import some tables with existing relationships based on composite keys, the Table Import Wizard will ignore those relationships.

So what should we do to solve the problem?

The solution is to combine the values of the composite keys. 

Here is how you can do the job?

·         Creating a view on top of the source tables:

1.  If you’re using SQL Server 2012 and above you can use the “concat” function to combine the values. The function combines several expressions regardless of their data types. So you can use it like this select CONCAT (1, 1.22100001,‘First’) SQL2012 and the result would be something like this


2.  If you’re using earlier versions of SQL Server then you need to mind the data types. So for the above sample the SQL code would be select cast(1 as char(1)) + cast(1.22100001 as char(10))+‘First’ SQL2008 . As we expect the result is the same.

·         Adding a new computed column to all tables involved in SQL Server before importing the tables to the tabular model

·         Adding a new calculated column to all tables involved after importing the tables to the tabular model

As a quick note, you’ll need to remove the existing relationships imported from SQL Server and create the new relationship based on the combined keys.

Easy peasy!

Resolving “Object reference not set to an instance of an object.” Error When Deploying your Tabular Model

You’ve changed something in your Tabular model and you’re facing an ugly “Error: Object reference not set to an instance of an object.” message, don’t rush. Just go to the table you’ve made some changes and click on “Partitions” button.


Then click “Refresh Preview” button and click OK.


All done!