With the introduction of Columnstore indexes we got Vertipaq Compression and Batch mode as the execution mode. The latter results in much faster query execution where large number […]
Tales from the crypt: – Passing multiple int values into a variable
Reference Post https://social.msdn.microsoft.com/Forums/en-US/7c04a296-3c26-4a43-ae63-bc90139f4ab3/error-converting-data-type-nvarchar-to-int?forum=sqlgetstarted I was browsing through the forums and found this question being asked. While the reason for the error is fairly obvious I felt it needed […]
Generating TPC H data for testing
A common requirement I have is to generate test data. Sometimes for trainings and sometimes for consulting work. As you may have seen from many previous video and […]
SQL 2019- Script for working with Resumable online indexes
Below is the script used in the video demonstrating Resumable online indexes feature in SQL 2019. https://youtu.be/xJTfyERfTkk USE master IF EXISTS ( SELECT 1 FROM sys.databases WHERE name […]
Tuple Mover Basics and the Updateable Columnstore index
When Microsoft introduced Columnstore indexes in SQL server 2012 a key limitation was the table could only be read from and not inserted. While the limitation itself has […]
Adaptive Joins SQL 2017
SELECT a.StateName ,a.CityName ,sum(flights) FROM Airports a INNER JOIN normalization_index n ON a.AirportSeqId = n.OriginAirportSeqID WHERE a.AirportSeqId > 1474703 GROUP BY a.StateName ,a.CityName SELECT a.StateName ,a.CityName ,sum(flights) FROM […]
94% Compression???? SQL Server from 1GB to 65 MB
In this video we go about taking data that is little over 1 GB in size and incrementally reducing its size all the way down to 65MB. This […]
SQL 2017 – Minor features
There are a tons of minor improvements of features in SQL 2017 that nobody talks about so I figured before we all get swept up with SQL 2019. […]
administration / Database / Errors / TSQL
Finding candidate keys/Primary keys from data that needs to be imported
This is a continuation from the previous post where we went and inserted data from multiple CSV files into SQL server tables using linked server connection. Often the […]
SQL 2019:- Truncation Error message and where it fails
I was wondering if I should even bother checking this feature out since it was pretty obvious what it does and how useful it is. I can’t even […]