Installing SQL Server 2016 Developer Edition and trying out Telco Customer Churn with R services.

During SQL Server Geeks Annual Summit 2016, #SSGAS2016 I was really impressed by Wee Hong Tok for his session on ‘SQL Server R services’ where I got to know more about SQL server 2016 and R services and the demo he presented in that particular session regarding Telco Customer Churn.

Also, another session that I am really impressed by Jen Stirrup for her session on ‘Delivering Practical Analytics and Results with Cortana Analytics’.  And also impressed by Andreas Wolter  Amit Bansal ,Other Speakers & SQL Server Geeks Community for such a friendliness and hospitality.

Since, I also work in Telco sector so first thing I want to try it out is what Wee Hong Tok had shown in his demo and thanks to Jen Stirrup where she introduce me with Cortana Analytics, I don’t know much of this SQL Server 2016 with R services and regarding Cortana Analytics now I want to know more on these.

One can find regarding Cortana Analytics and Telco Customer Churn from below links.

So, if you also want to try out this then all you need is firstly download the SQL Server 2016 Developer Edition or SQL Server 2016 Evaluation version for 180 Days.

For step by step installation you can follow below link

Before installation SQL Server 2016, you need to install Java Development Tool kit.

Also, don’t forget to check the R Services (In-Database) tab during installation, also there is separate R Server (Standalone) during installation just prefer R Services ( In-Database) option.


You can find more on R Services (In-database) and R Service (Standalone) from below links.

Once installation compete, in order to test Telco Customer Churn just go to below link to get the backup file for Telco Customer churn in GitHub link below,

Get the teloedw2.bak file and restore in SQL Server 2016 database, now read the file which contains:


Restore the database provided (telcoedw2.bak)

Run the code in TelcoChurn-Main.sql


TelcoChurn-Main.sql – Use this T-SQL script to try out the telco customer churn example.

TelcoChurn-Operationalize.sql – T-SQL scripts to create the stored procedures used in this example.

while going through above scripts and trying out Customer Churn I got few errors, so I am sharing my finding here, anyone if gets same error then this post might be helpful.

After installing SQL Server 2016 developer edition and trying for this Telco Customer churn SQL server scripts. I got certain error while running scripts TelcoChurn-Main.sql and TelcoChurn-Operationalize.sql. For first, after google I found out we need to change the Memory_Limit_percent in order to run above sq. scripts. So, just add MEMORY_LIMIT_PERCENT=50 into the config file for Rlauncher.config which can be found in below location:

C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Binn

Change as below;


While running this script TelcoChurn-Operationalize.sql we need to firstly install the required R packages, I have also uploaded one SQL File which installed required R packages before running the scripts of telco customer churn into my folk repository for sql-server-samples. The file contains enabling sp_execute_external_script to run R scripts in SQL Server 2016 and installing required R packages in order to run the Script TelcoChurn-Main.sql and TelcoChurn-Operationalize.sql successfully. Since we need to install those R packages before we run the scripts in order to avoid the error.

After that all the scripts run successfully and now you can learn more about R Services and R scripts & algorithm used and then test along with your own Telco data. Which I am planning to try out and will try out for sure.

There is always something new to learn into the world of DATA so called BIG DATA & now DATA Science/Analytics and Machine Learning.


Anil Maharjan

Speaking at SQL Server Geeks Annual Summit 2016, Asia’s Only Data & Analytics Conference.

Firstly I am happy and excited that I will be speaking at SQL Server Geeks Annual Summit 2016, Asia’s Only Data & Analytics Conference. I have been selected as a Speaker from Nepal and am representing as only one speaker from Nepal.

About the Conference:

SQLServerGeeks Annual Summit 2016 (SSGAS 2016) is Asia’s Only SQL Conference focusing on Microsoft Data. Scheduled from Aug 11-13 (Pre-Con on Aug 10) at NIMHANS, Bangalore, the summit will see 120+ sessions being delivered by 50+ speakers across 3 days. Joseph Sirosh (CVP, Data Group) will key-note the conference. Complete MS Data Platform stack is being covered at the summit. Speakers include Group PMs, Senior PMs, PMs, Premiere Field Engineers, Escalation Engineers & Data Architects from MTC. SQL CAT, SQL TIGER & Global Black Belt Team from Microsoft will deliver top-notch content and spend quality time with attendees at the convention center.

More details are here:

I am Speaking

Why one should attend this conference:

  • To get real-world training from industry experts
  • Know the latest trends in Data & Analytics world
  • Special focus on Analytics, Cloud & Big Data
  • To network & connect with the MVPs, MCMs
  • To learn from SQL product team, Redmond
  • Direct access to product team members
  • Benefit from new delivery formats like Open-Talks & Chalk-Talks*
  • Expert level demo-oriented sessions
  • Five parallel full-day classroom training

Please do register and be a part of this great event and follow #SSGAS2016 on Twitter for more news.

Hope to see you there and don’t forget to say hello to me in the event.


Anil Maharjan

Senior BI Engineer

SQL Server 2016 Discovery Day – Data Visualization using R and Power BI.

SQL Server 2016 Discovery Day – Data Visualization using R and Power BI.

Last week we conducted the SQL Server 2016 Discovery Day –Release Event Kathmandu, Nepal successfully on July 9th 2016. SQL Server Launch 2016 Event and Discovery Day is a free, one-day event where individuals come together, learn about SQL Server 2016 and solve a pre-determined problem.

I got a chance again to speak in this great event and it was fun and share knowledge along with other SQL Geeks, I had given presentation on

SQL Server 2016 Discovery Day – Data Visualization using R and Power BI.

You can find my slides using below link:

Also, we had a small solution development competition in the event where we use Power BI Desktop free tool in order to create some visualization and tell some story behind data.

Below is some quick visualization that I had created in the event by using PASS SQL Saturday real Data.

Steps for Making Data visualization by using Power BI Desktop.

Step 1: Firstly, download and install the Microsoft Power BI Desktop tool, which is free from the link below also for R related charts and play around with R codes we need to download R , RStudio IDE and install too. Below is link for Power BI Desktop, R, and RStudio IDE.

Step 2: Get the data related to SQL PASS, SQL Saturday from the link below:

This zip data files contains the different .sql files with data included within scripts.

Step 3: Load those scripts into SQL Server Database and then use Power BI Desktop ‘Get DATA’ tab to load the Data into Power BI Desktop and do visualization.


Alternative:  If you haven’t install the SQL server Database then you can use a single file such as ‘dbo.SQLSatSessions.Table.sql’ and then Excel file to manipulate the data in your required format.

Step 4: Load the only data part from the file ‘dbo.SQLSatSessions.Table.sql’ into excel as below


Then use Text to Columns tab in DATA tab section as below to make the data into proper column format.


Once you prepare your data as below format then now you can start analysis using Power BI Desktop.


Step 5: Use Power BI step 3 or Step 4 to load the data into Power BI. We have use step 4 here so now use Power BI to load data from Excel source then you will get data columns in right hand side as below.


Step 6:  Now start visualization using Power BI Desktop free tool, here we are using data of SQL Saturday session details and prepare different line chart, tree map, filled map , Table , R script Visual different charts that we have used to show different visualization details as below.



One can learn how to create these different charts by going through below links

Step 7: For now just for sample how we can simply create a line chart by just drag and drop feature of Power BI Desktop.

Just go to right side of Power BI Desktop and select EventDate and SQLSATURDAY filed and drop Eventdate in Axis and SQLSATURDAY into Values section and change the SQLSATURDY value as count by just clicking on SQLSATURDY field in Values section.

blog7Just simple so you can try these different charts by simply drag and drop feature.

For R script Visual you need to know some R language first in order to create R visualization chart in Power BI . One can learn R from

Step 8 :Publish these reports on Power BI cloud service by just clicking Publish button from Power BI Desktop , also now one can also publish these reports to publicly in web. Once you publish your report in Power BI service go to Reports -> Your Report -> File -> Publish to web . After that anyone can go through these reports publicly in the web.

Also, URL that you get through publish to web can be embedded to your website along.


In Summary, from these above Power BI Desktop Visualization it helps to tells us that which SQL Saturday is conducted in which state, country in which year and a particular Day along with total sessions conducted. It also helps us to tell us that SQL Saturday trends year on year and mostly in September month most of SQL Saturday is conducted as per SQL Saturday data history.

Also, it helps to tell the distribution of state wise SQL Saturday conducted states .which shows most of SQL Saturday happens in North America.

Speaking at SQLSaturday Nepal SQLSaturday #482 .

Firstly I am happy and excited that I will be speaking at SQLSaturday#482 on March 26 2016. This is my second time for this International SQLSaturday event and I’m really excited that I will be speaking this time.

I will be speaking on ‘Using power query to tell your story form your Facebook data’ here is my abstract detail:

The session is mainly for the one who is trying to extract the story behind their Facebook data by using Power Query. By using Power Query you can extract your Facebook data easily and do analysis your own story by using your own Facebook data.

Talking about Power Query: Microsoft Power Query for Excel is an Excel add-in that enhances the self- service Business Intelligence experience in Excel by simplifying data discovery, access and collaboration.

Power Query can connect data across a wide variety of sources, where Facebook is one of the data source.

This session helps you to learn about the Power Query, Power View, and Power BI and mainly helps you to do self-service BI by using your own Facebook data with the help of Power Query, Power View and MS-Excel 2013.

So, What is SQLSaturday?

SQLSaturday is a training event for SQL Server professionals and those wanting to learn about SQL Server. Admittance to this event is free, all costs are covered by donations and sponsorship. Please register soon as seating is limited, and let friends and colleagues know about the event.

This event will be held on Mar 26 2016  at Hotel Himalaya, Sahid Shukra Marg, Kathmandu, Central Region, 44600, Nepal.

Please do register and be a part of this great event.

Hope to see you there and don’t forget to say hello to me in the event 🙂


Anil Maharjan

BI Engineer

How to Install Vertica in a single node.

Install Vertica in a single node. 

This article is mainly related to:

  1.  Setup of Vertica in a single node.
  2. Vertica Console Management
  3. Tableau
  4. DBeaver

During my free time, I want to try to install Vertica and want to know what it is all about. what are the things we should know while installing Vertica and what will be the issues, difficulties, requirements and process do we need to follow in order to setup Vertica and play around it.

The HP Vertica Analytic Database is based on a massively parallel processing (MPP), shared-nothing architecture, in which the query processing workload is divided among all nodes of the Vertica database.

If you want to try Vertica and play around along with this columnar database then you should follow below steps.

Step 1:

Firstly you should have any Linux OS installed in a machine. For Vertica, the minimum requirement is to have 3 nodes that mean’s three Linux OS running in different nodes. But, in my case I want to try to install in only one node and try it out. I have windows 7 OS install and where I have install Red hat Linux in my virtual machine. So, make sure you have at least one Linux OS installed machine.

You may find the below link to find out the minimum requirements and server configuration:

General Platform Recommendations

  • ext4 is recommended over ext3 for performance reasons.
  • Use 2GB of swap space regardless of the amount of installed RAM.
  • Place the database /catalog directory on the same drive as the OS.

Step 2:

Download all the required software related to Vertica from the site

In order to download you can sign up in a community edition. All the stuffs you can know from below video:

Here, I have downloaded the below versions:

Step 3:

After that move the setup files into Red Hat Linux virtual machine directory. I have put the setup files into directory as /data/software and then open the terminal in VM,

Run the below command as root user:

rpm -Uvh /data/Software/vertica-7.0.2-1.x86_64.RHEL5.rpm

Then after that it will ask to run the /opt/vertica/sbin/install_vertica to complete the installation.

Step 4:

Run the script in master node

# /opt/vertica/sbin/install_vertica -s host_list -r rpm_package -u dba_username

Here I used only one node so below is my script.

 /opt/vertica/sbin/install_vertica -s localhost -r /data/Software/vertica-7.0.2-1.x86_64.RHEL5.rpm -u dbadmin

Here, you need to note that if you want to install Vertica in multiple nodes then you can include different nodes or host list.

Where options are:

-s host_list comma-separated list of hostnames or IP addresses to include in the cluster; do not include space characters in the list.

  1. -r “vertica_6.0.x.x86_64.RHEL5.rpm”
  2. -u dbadmin user name
  3. -p dbadmin passowrd
  4. -P root password
  5. -L location of the license
  6. -d where data will be located
  7. -s nodes that will be part of the cluster
  8. -r location of the installation rpm

— If you omit the -u parameter, the default database administrator account name is dbadmin who will only use the admintools.

You can find more about installing vertica in 3nodes or complete cluster Installation in below link:


After that you will get some issues or errors as below which I have got

>> Validating node and cluster prerequisites…

Failures during local (OS) configuration for verify-

HINT (S0305):

TZ is unset for dbadmin. Consider updating .profile or .bashrc

HINT (S0041):

Could not find the following tools normally provided by the mcelog

package: mcelog

HINT (S0040):

Could not find the following tools normally provided by the pstack or

gstack package: pstack/gstack

WARN (N0010):

Linux iptables (firewall) has some non-trivial rules in tables: filter

FAIL (S0150):

These disks do not have ‘deadline’ or ‘noop’ IO scheduling: ‘/dev/sda1’

(‘sda’) = ‘cfq’, ‘/dev/sda3’ (‘sda’) = ‘cfq’

FAIL (S0020):

Readahead size of sda (/dev/sda1,/dev/sda3) is too low for typical

systems: 256 < 2048

FAIL (S0030):

ntpd process is not running: [‘ntpd’, ‘ntp’]

FAIL (S0081):

SELinux appears to be enabled and not in permissive mode.

FAIL (S0310):

Transparent hugepages is set to ‘always’. Must be ‘never’ or ‘madvise’.

Then go through each error in the link below

This is all about some cluster prerequisites. Here go through each FAIL(XXXX) in the community forum where you will get the solution for each error.

Step 6:

After that, run the admintools from the dbadmin user then you can see as

After that create the database:

Then choose the host name where database will reside:

Then, define the Catalog location and data path

Since I have installed Vertica in a single node so there will not be the concept of K-Safe method. If we are installing at least 3nodes then we can have k-safe.

After that,

Then create Vertica database as Vertica_DB in a single node.

After that the database will created.


Just click OK and you will see the Database configuration:

Then finally you can exit from the admintools:

Step 7:

Vertica management console:

After successful installation of Vertica Database now you can install the Vertica management console:

The new HP Vertica Management Console is an enterprise database management tool that provides a unified view of your HP Vertica database and lets you monitor multiple clusters from a single point of access.

You can find more on below link:

Run the command as a root user:

rpm –Uvh vertica-console-7.0.2-1.x86_64.RHEL5.rpm

After successful installation it will show URL as https://localhost.localdomain:5450/webui during the installation. Just go through the URL and accept the license

What you can do with Management Console

  • Create a database cluster on hosts that do not have HP Vertica installed
  • Create, import, and monitor multiple HP Vertica databases on one or more clusters from a single point of control
  • Create MC users and grant them access to MC and MC-managed databases
  • Manage user information and monitor their activity on MC
  • Configure database parameters and user settings dynamically
  • Access a single message box of alerts for all managed databases
  • Export all database messages or log/query details to a file
  • View license usage and conformance
  • Diagnose and resolve MC-related issues through a browser
  • Access a quick link to recent databases and clusters
  • View dynamic metrics about your database cluster

The features is so much helpful for the DBA’s and the developer from where they can easily monitor multiple HP Vertica databases on one or more clusters from a single point of control.

Detail setp to install and login setup process is shown in my slideshare , you can see the link below :


Tableau can help anyone see and understand their data. Connect to almost any database, drag and drop to create visualizations, and share with a click.

To know the story behind your data which is stored in Vertica DB, you need to have a reporting tool which can make a quick decision and helps you to get the value of your data.

This is where Tableau can be used. Which is one of the best Reporting Tool I must say.

One can go to Tableau portal and download the software and play around any database, Worksheets, excel files and so many other data files.

I have downloaded both desktop and public version of Tableau, and where as desktop version works for 15 days trail.

Now in order to connect Vertica DB through Tableau you need to install the Vertica client in your PC i.e. my windows 7 machine, where you need to download the vertica-client-7.0.2-1.64 from

Also, you can install the test db along with Vertica as VMART schema but in my case I am getting error so I have posted into Vertica community .One can join this community and can share ideas and issues.

After that you can open tableau desktop and connect to Vertica DB in order to play around with and to find the story behind your data.

Also, you can have public tableau install in your PC and do some analysis using different worksheets, I have also done some analysis related to ‘Average Percentage of Internet Users across the World ‘ and published into public server which is free that Tableau providing for normal users.


DBeaver is free and open source (GPL) universal database tool for developers and database administrators.

  • Usability is the main goal of this project, program UI is carefully designed and implemented.
  • It is freeware.
  • It is multiplatform.
  • It is based on opensource framework and allows writing of various extensions (plugins).
  • It supports any database having a JDBC driver.
  • It may handle any external datasource which may or may not have a JDBC driver.
  • There is a set of plugins for certain databases (MySQL and Oracle in version 1.x) and different database management utilities (e.g. ERD

You can find more from the link :

I just found this tool so easy to connect with Vertica DB and do some queries analysis


Through this article, I am sure you are now able to understand how you can install Vertica Analytic Database in a single node and how you can use Vertica Management Console to monitor multiple clusters from a single point of access. How you can easily get the story behind your data in Vertica DB by using the Tableau Reporting tool.

Also, how you can use quires to do more detail analysis by using the DBeaver tool in Vertica Database.

More detail step by step full artice can be download from the link below :


Anil Maharjan

BI Engineer

Using Power Query to tell your story form your Facebook Data.

Using Power Query to tell your story form your Facebook Data.

Most of the time of this weekend, I spent my time to extract the story behind my Facebook data by using Power Query. Power Query can connect data across a wide variety of sources, where facebook is one of the data source. By using Power Query you can extract your facebook data easily and do analysis your own story by using your own facebook data.

Talking about Power Query: Microsoft Power Query for Excel is an Excel add-in that enhances the self-service Business Intelligence experience in Excel by simplifying data discovery, access and collaboration.

Microsoft Power Query for Excel, is a new add-in that provides a seamless experience for data discovery, data transformation and enrichment for Information Workers, BI professionals and other Excel users. With Power Query you can:

  • Identify the data you care about from the sources you work with (e.g. relational databases, Excel, text and XML files, OData feeds, web pages, Hadoop HDFS, Facebook Data etc.).
  • Discover relevant data from inside(*) and outside your organization using the search capabilities within Excel.
  • Combine data from multiple, disparate data sources and shape it in order to prepare the data for further analysis in tools like Excel and Power Pivot, or visualization in tools like Power View and Power Map.

You can easily download from the link below:

You can find more about Power View, Power Map, Power BI and Q&A from the official Microsoft Power BI site.

Now, I think you have installed Power Query add-in in Excel 2013 professional edition,

So, let’s drill into your Facebook data to extract your story .!!!

Firstly you need to open Excel sheet and go to the Power Query ribbon bar in Excel, then go to the ‘From Other Source’ section where you will see the ‘From Facebook option’ from dropdown list.


Due to the so many slides or pages, the detail step by Step guide have uploaded into my Slideshare account. You can download or go through the section in order to know how to use Power Query and how to extract your Facebook Data and how to do analysis using Power View to tell the story. Here is the Slideshare:

Slideshare link

Where I have use Power View to analyse the facebook data and give us some story to view.

Here I have used three Power Query Analysis, I think you will find these easy after you once go through the slides in above link where I have listed detail step by step method to do these analysis or if you have some knowledge of Power View then it must be quite easy to do analysis.

Power Query Analysis 1 using Power View:

  • Let’s see when you have added your friends.
  • Through this analysis you can find out the total friends added in facebook, in which year, month.
  • First and recent friends connected within facebook.
  • You can know when you are connected with which friend.

Happy to see the results. 🙂

Now you want to know first and recent friends connected within Facebook along with which time they have added . You can get it by using  period field in Tile By and story field in rows with friend added filter field in column . This shows the first friends that you have added in facebook. Happy to see the result. 🙂

If you need to find out the recent added friends in Facebook then just click the last period.


Here as per chart I can clearly see that I have added a lot of friends in 2009 and 2010. Since that is the year when I had completed my computer engineering course and most of my time I was spending in facebook. Quite amazing it does remind my past college life. Power Query along with Power View actually can tell us story of our own. Happy to find out my past.

This is such a cool tool, Power Query and Power View along with Power BI, You can visualize the things you just want to see.

Power Query Analysis 2 using Power View:

  • Ø Now, let’s see how many of your friends are male and female. 

I think after going through the slides you will surely know how to get the data from Facebook using Power Query for friend list and how to use Power View to analysis. You can go through detail steps again from slides to do this analysis.

Power Query Analysis 3 using Power View:

  • Let’s see your facebook activities from past to present.

This will help you to track down how much time have you spent in facebook and how frequent you post or update your feeds.

This will helps facebook to track down the facebook user usage trend.

  • How and when user is spending the time in facebook.
  • Why the facebook user usage trend is decreasing or increasing.
  • What is the reason behind the feeds data of user is decreasing or increasing.

For the facebook activities analysis, you can use the same feed information worksheet and by creating new Power View and line chart option you can start analysis of facebook activities from different perspective.

From graph we can clearly see that there is a huge spike in 200907 to somewhat up to 201003 this is still because this is the time when I had completed my computer engineering course and most of my time I was spending in facebook.

Also, going on next year in 201109 there is another spike which is due to that month is my birthday on 04thSeptember, where there is more feeds regarding my birthday wishes.

Now, let’s see the current year facebook activates by using similar Power View and same drag and drop features and by scroll down to last month date 201405 you can see the trend of your current facebook activities.

Here from line trend analysis it seems that the facebook activates from past year to current is frequently decreasing in my case. This is due to that I am spending less time in facebook as compares to previous year where I use to spend most of my time.



Power Query along with Power View actually can tell us story of your own. This is how Power Query along with Power View can tell your story by using your own facebook data. Happy to find out my past.

Quite amazing it does remind my past college life.

This is such a cool tool, Power Query and Power View along with Power BI, You can visualize the things you just want to see.

Also, I am thinking that if facebook provides our friends location data then it will be so easy to find out the friends and family around the world. Where Power Map will be more useful to track down the friends whom we have no idea where she or he is but we do connected with facebook in virtual world. If we can think of creating facebook friends and family location track app which will helps us to find out where exact is our friends and family are located based on the current location information of facebook data.


Anil Maharjan

How to transpose rows to columns in oracle.

In some case we need to transpose the table data that means we need to change the rows value into columns, and then this blog post will be surely helpful.

Let’s say we have to find out the trend of expenses of the customer or say some account no or mobile no for some few months to find out his or her behavior such as we have a data in table ‘Pivot_Table’  as

MobileNO TotalExpenses 	Date
1	3000	20140101
2	5000	20140101
3	7000	20140101
1	5000	20140201
3	9000	20140201
2	3000	20140201
1	1111	20140301
2	2222	20140301
3	3333	20140301

Now, in order to find out the behavior analysis for the certain months per MobileNO, we need the output such as

MobileNO JanExpenses	FebExpenses	MarchExpenses
1	3000 		5000		1111
2	5000		3000		2222
3	7000		9000		3333

This can be easily done by using the PIVOT function for Oracle version11.2

But if your oracle version is old than 11.2 then you can use DECODE function to obtain such solution:

DECODE is a function in Oracle and is used to provide if-then-else type of logic to SQL. It is not available in MySQL or SQL Server. The syntax for DECODE is:

SELECT DECODE ( "column_name", "search_value_1", "result_1", 
["search_value_n", "result_n"],
{"default_result"} );

"search_value" is the value to search for, and "result" is the value that is displayed.

Here is my Query:

SELECT /*+parallel(t,4)*/
    	MAX(DECODE(Date, 20140101, TotalExpenses)) AS JanExpenses,
MAX(DECODE(Date, 20140201, TotalExpenses)) AS FebExpenses,
MAX(DECODE(Date, 20140301, TotalExpenses)) AS MarchExpenses
    Pivot_Table t

Hope this post will be helpful.


Anil Maharjan

Watch 24 Hours of PASS Business Analytics sessions if you had missed any.

From yesterday evening to till today morning I had a great time attending the ‘24 Hour of PASS Business Analytics’ free live 12 back-to-back webcasts from various BA Conference speakers.

If you have missed out to join the live sessions on 5th Feb 2014th which had begin at 08:00PT / 11:00 ET / 16:00 GMT, then no worries the recorded webcasts sessions is available now and you can just check out those great session and am sure you will get some great knowledge in the world of BA from a great speakers around the world.

You will be able to know the story behind your own DATA through these great sessions.

Also, there is a contest #pass24Hop Challenge organized for this event, where anyone can take part in the challenges and if you are lucky enough and passionate about DATA and BI then you could get a chance to win a free ticket to2014 PASS Business Analytics Conference which is going to be held on San Jose, CA from May 7-9. I think this event will be a great success and will bring more new challenges and opportunity in the world of BI, BA. Wish I could also attend this event  🙂 !!!


Anil Maharjan

Some Question and knowledge learn from PASS Summit 2013 Preview

The session’s was really great and so do the Speakers . Learn a lot off stuffs and knowledge from 24 hours for PASS SUMMIT Preview.

Here are some of the question I have asked so far and by doing some research on that I found some answers as:

1.Power view loads data in Memory, so how big data set can it load and will it be significant to work/analysis as similar to multidimensional OLAP cube analysis.?

: I could not get the clear answer of this one but I think Power view can’t be used as significant as SSAS providing .

2.Will SQL server going to handle the BIG data as similar like Hadoop and others.

Since they are quite different  product I know, Microsoft Big Data offers an integrated platform for managing data of any type or size, whether it is structured data from a relational data warehouse such as SQL Server 2012 Parallel Data Warehouse, unstructured data on Hadoop or streaming data.

PolyBase is a breakthrough new technology on the data processing engine in SQL Server 2012 Parallel Data Warehouse designed as the simplest way to combine non-relational data and traditional relational data in your analysis. So, MSSQL 2012 focusing  for Big DATA , structured/ Unstructured data as like Hadoop currently emerging.

3.Can Power view used to analyze the Multidimensional OLAP cube?

I think this feature is released in SQL Server 2012 SP1 CU 4 and still not works in Excel 2013 if I am not wrong.

4.Is it better to use 50-60 left join from almost 50 tables having cluster index to populate a single fact table or we can use some intermediate table using 20-20-20 joins and lastly join those tables to populate a single fact table.

: still waiting for answer

5.what will be the performance issue while replication AlwaysON High Availability and how does it sync with primary to secondary .

:This is nice feature I notice about in SQL 2012.

6.what will be better approach vertical partitioning or horizontal partitioning in SQL 2012.

:Vertical partitioning since horizontal partitioning is quite complex in SQL 2012 as per speaker.

7.Does Power view and Power Map only support Bing maps, can’t we use a Google maps.

:No, we cannot use Google maps for now.

These are some of the question I have asked so far, and the answers may not be quite enough or correct.

I hope someone knows better answer for these question too so, if you have any please share some.

That will surely helps us and wish I could attend the PASS Summit 2013 that is going to held on

Charlotte, NC: October 15-18, 2013 .


Anil Maharjan

Think while Rename a Column Name of Table in SQL.

If someone tries to rename the column of table then we write a query as

SP_RENAME  'TableName.[OldColumnName]' , '[NewColumnName]', 'COLUMN'
--we use as
SP_RENAME  'DimCustomer.[FirstName]' , 'CustomerName' , 'COLUMN'
SP_RENAME  'DimCustomer.[FirstName]' , '[CustomerName]' , 'COLUMN'
which gives the column the name [CustomerName], not CustomerName.
For rename the column

You don’t use the [] escape in the second argument but by mistakenly if we use ‘[CustomerName]’ as new column name instead of CustomerName.

It sucessfully updates the column but while we select that column it’s now gives the error as

"Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong"

Also while we try to drop the column itself we cannot delete it. It also gives error as

ALTER TABLE DROP COLUMN failed because column '[CustomerName]' does not exist in table 'Customer'.

Does that mean we have to recreate the customer table since the renamed column [CustomerName] cannot use in select statement too.

Well there is a method for changing the mistakenly rename column ‘[CustomerName]’ to CustomerName . Just simple you need to go to the table DimCustomer and then click plus sign of the table and then you can see the list of columns of DimCustomer table then right click and add New Column tab which will edit all the list of columns and there you go just change the ‘[CustomerName]’ to CustomerName . This will solve the issue we are having.


If someone by mistakenly rename the column as above and getting similar issue this post will be surely helpful.

Also, there might be any alternative T-SQL method then please suggest some idea that will surely helpful.


Anil Maharjan