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SQL and SQL Only

I am Nagaraj (aka Raj), a SQL Server Database Administrator for one of the busiest OLTP systems in Singapore. Being a SQL Enthusiast for over 10 years now, I love to explore and share more and more on SQL Server.

Data Channel Interview - 06 - Manohar Punna on SQL Azure Migrations

Here we go for the 6th interview on #DataChannel. Manohar Punna, MVP and Data Platform Geeks President discusses "Migrations to SQL Azure" on #DataChannel. Manohar, in this interview provides valuable inputs on migrating to SQL Azure, challenges involved and methods to monitor and size SQL Azure databases. Happy…

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0 comments, 417 reads

Posted in SQL and SQL Only on 30 April 2017

SQL Saturday Christchurch 2017


Dear All,

 Last week, I had travelled to the beautiful city of Christchurch, for speaking in SQL Saturday South Island. This is by far the farthest I have travelled for a SQL Saturday, nearly 8500KMs from Singapore. I am so glad, I made it as it turned out to be…

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3 comments, 550 reads

Posted in SQL and SQL Only on 13 April 2017

Data Channel Interview - 05 - Edwin Sarimento on Availablity Groups & High Availability

Dear all,

On the 5th interview of #DataChannel, Mr.Edwin Sarimento, MVP, MCM and a popular high availability expert discusses SQL Server Always on Availability Groups and High Availability options in SQL Server. In this interview, Edwin gives a totally new dimension to common perceptions on high availability.


Sharing a few top…

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0 comments, 305 reads

Posted in SQL and SQL Only on 12 April 2017

Data Channel - Interview 04 - Martin Catherall on In Memory OLTP

Welcome to the 4th Interview of Data Channel.
We have Mr.Martin Catherall, 3 time Data Platform MVP from Australia / New Zealand discussing "In Memory OLTP" tables. Interview was shot at his wonderful home in Melbourne. I would like to thank Martin for sharing his knowledge for the SQL Community.…

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1 comments, 249 reads

Posted in SQL and SQL Only on 27 March 2017

MVP 2016!!!

Dear All,

Very happy to share the news that I have been awarded Microsoft Most Valuable Professional award for my contributions to SQL Server Community in 2016!!!. This is an honor I have dreamt of for long needless to say that the award motivates me to contribute more for the…

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3 comments, 351 reads

Posted in SQL and SQL Only on 22 January 2017

Data Channel - Interview 03 - Hamish Watson on DevOps and Azure


Dear All,

After a short break, we are back with the 3rd interview on #DataChannel. Mr.Hamish Watson, Community Lead from Christchurch, New Zealand discusses "DevOps Practices and Azure" with me.  Had a great time as always talking technology with the ever awesome Hamish. Interview recording provided below




Interview transcript to…

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4 comments, 961 reads

Posted in SQL and SQL Only on 18 January 2017

Data Channel - Interview 02 - Hamid Fard on SQL Server Memory Capacity Planning

Dear All,

Welcome to the second interview of Data Channel. Very happy and proud to have Mr Hamid Fard, MVP and MCM from Malaysia for Data Channel. Hamid discusses SQL Server Memory Capacity Planning on Data Channel. Discussion covers topics like SQL Server Memory sizing, AWE, Plan Cache, In Memory…

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5 comments, 1,506 reads

Posted in SQL and SQL Only on 31 December 2016

Query Store- Part 5: Checking forced plans and Query Store Failures

Most of you would know that using query store one can force query plans. Is there a need to check what plans are forced? Why?

Fundamentally, two important reasons for checking forced plans. 

1) To check if the query is yielding the desired performance?. The performance needs to be obviously…

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1 comments, 491 reads

Posted in SQL and SQL Only on 26 December 2016

R and SQL Server 2016

Yesterday, I delivered another session for Singapore SQL PASS Chapter. The session titled "R and SQL Server 2016" was giving an overview on "R" integration with SQL Server 2016 and also demonstrated how database administrators can apply "R" in their day to day operations. Video provided below. Thanks to Engineers.SG

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2 comments, 1,993 reads

Posted in SQL and SQL Only on 22 December 2016

My Interview at SQL Server Geeks 2016

One of the biggest highlights of this year for me was speaking at SQL Server Geeks Annual Summit 2016. In the summit, I gave an interview to the SQL Server Geeks team on my summit experience. Video provided below




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0 comments, 336 reads

Posted in SQL and SQL Only on 11 December 2016

Query Store - Part 4 - Find the plans and queries forced by Query Store

As most of you know, one of the most fundamental uses of query store is to force query plans. Unlike query hints, Query store doesn't demand code a change nor it is complex to implement like plan guides. One can force a plan without make a query / code change…

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0 comments, 454 reads

Posted in SQL and SQL Only on 8 December 2016

Data Channel - Interview 01 - Andreas Wolter on Columnstore

Dear all,

Welcome to the first ever interview of DataChannel. I am honored to have Mr.Andreas Wolter, a German MVP, MCM, MCSM for the first interview. Detailed profile of Andreas provided below.

Andreas Wolter has over 16 years of experience with SQL Server and earned the Master-Certification both on SQL Server…

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0 comments, 657 reads

Posted in SQL and SQL Only on 3 December 2016

SQL Server 2016 SP1 – Rocking RELEASE!!!

Last week, I did a presentation titled "SQL Server 2016 SP1 – Rocking RELEASE!!!" to Singapore SQL User Group. The Presentation was about the things I covered over here and few more cool features released with SQL Server 2016 SP1. The best part of it was it was recorded :) This…

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0 comments, 671 reads

Posted in SQL and SQL Only on 29 November 2016

Data Channel - Launch

Dear All,

I am starting a YouTube channel for SQL Server and Microsoft Data Platform Technologies called "Data Channel". What this channel is going to contain is Interviews with SQL Server and Data Platform experts like MVPs, MCM , Community Leads and Microsoft Professionals too. Interviews are generally 15 to…

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1 comments, 353 reads

Posted in SQL and SQL Only on 26 November 2016

SQL Server 2016 - SQL Service Doesn't Start after GDR Security update

Recently, after an security fix GDR (https://support.microsoft.com/en-us/kb/3194716) on  SQL Server 2016 RTM, SQL Service refused to start. Though, the patch completed successfully as per 
"C:\Program Files\Microsoft SQL Server\130\Setup Bootstrap\Log", the Event viewer under "System" gave the following error

"The SQL Server (I2016) service terminated with the following service-specific…

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0 comments, 748 reads

Posted in SQL and SQL Only on 20 November 2016

SQL Server 2016 SP1 Release - Thoughts and Comments!!!

SQL Server 2016 SP1 has released last night and most of the features that were previously part of enterprise edition have been made available in standard edition now!!!! By far, the biggest change any service pack brought about in any version of SQL Server!!!

List of items provided below which moved…

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0 comments, 623 reads

Posted in SQL and SQL Only on 17 November 2016

Residual Predicate and "Number of Rows Read" in Execution Plans

What is Residual Predicate?

Lets say one gets a query to fine tune. While checking the execution plan, if there is a Index seek, it is common for DBAs to think that the query performance is good and acceptable. Though in most of the scenarios, the idea of looking for…

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2 comments, 2,395 reads

Posted in SQL and SQL Only on 13 November 2016

SQL Server 2016 - “Number of Rows Read” on Execution plan


One of the coolest things to release with SQL Server 2016 was “Number of Rows Read” information in execution plan. If you are wondering, what it is look at the picture below




What “Number of Rows Read” operator actually talks about is the total number of rows read by the…

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0 comments, 668 reads

Posted in SQL and SQL Only on 10 November 2016

Query Store - Part 3 - How it works?

Query Store collects 2 important kinds of data. They are

1) Compile time statistics - Query Plan, Estimated Costs, Estimated number of rows etc..

2) Runtime statistics - Cost of the query, row count, IO cost, memory, Degree of parallelism etc.


How it actually stores is, when plan is loaded…

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0 comments, 727 reads

Posted in SQL and SQL Only on 6 November 2016

Folders to Check for errors in SQL Patching or Installation

Recently, while applying SQL Server 2012 Service Pack 3, encountered the following error and SQL Patch failed to upgrade.

"The patch installer has failed to update the following instance: MSSQLSERVER. To determine the reason for failure, review the log files"

For troubleshooting the same ( or any patching ), I…

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0 comments, 600 reads

Posted in SQL and SQL Only on 4 November 2016

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