Upcoming International Speaking Engagements

Published On: 2020-02-19By:

I am very excited and fortunate to be chosen to speak at both SQLBits and DataGrillen this year. These two conferences are incredible community run events and if you can attend either of them, I would highly recommend it.  Here’s a little bit about each event and information on how you can register. If you can attend be sure to check out my sessions.

SQLBits

SQLBits the largest SQL Server conference in Europe, being held in London England March 31st– April 4th. It is a conference for leading data professionals with over 200 sessions from speakers all over the world.

https://sqlbits.com/

Join Me -Thursday April 2nd 17:10 Room 10

Always Encrypted for Beginners

One of the biggest challenges to successful implementation of data encryption has been the back and forth between the application and the database.  You have to overcome the obstacle of the application decrypting the data it needs.  Microsoft tried to simplify this process when it introduced Always Encrypted (AE) into SQL Server 2016 and Azure SQL Database.  In this demo intense session, you will learn about what Always Encrypted is, how it works, and the implications for your environment. By the end you will know how to now easily encrypt columns of data and just as importantly how to unencrypt. You will also learn about the current limitations of the feature and what your options are to work around them.

 

DataGrillen

https://datagrillen.com/

DataGrillen is a SOLD OUT 100% free training event with the biggest and brightest of the data platform world. Held in Lingen Germany each year it is the must attend event in the region.

Join Me – Thursday May 28th 16:30 Room Handschuh

Mastering Tempdb

Have you experienced performance problems caused by contention in TempDB? Have you ever wondered why your TempDB is suddenly 3 TB? In this session, you will learn about all the various components of SQL Server that use TempDB. Whether it be AlwaysOn Availability Groups, Read Committed Snapshot version stores, spills, or simply temporary tables, learn about how to identify what SQL Server or your applications are doing in TempDB. Once you understand all the ways SQL Server uses this critical resource, and how to proper configure it, you’ll be better prepared for your workloads whether it be an Azure VM, a physical server, or a container.

Be sure to check out my fellow Denny Cherry and Associates sessions at both events. Click the links for the full schedules.

SQLBits – John Morehouse, Joey D’Antoni

DataGrillen -Denny Cherry, Joey D’Antoni, John Morehouse and Meagan Longoria

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Connecting to an AKS Cluster

Published On: 2020-02-17By:

When you create a new AKS cluster in Azure, which is a Kubernetes cluster, you need to tell your computer how to connect to the AKS before you can use it to do things like creating containers, create a SQL Server 2019 Big Data Cluster, etc.

You do this using the Azure CLI using the below command.

az aks get-credentials --name aks-cluster --resource-group aks-resource-group

Are you ready to build out our Azure aks environment? We at Denny Cherry & Associates Consulting can help. Contact our sales team to get started on building your aks environment today.

Denny

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I Presented with Live Captioning and Sign Language Interpreters

Published On: 2020-02-13By:

I had the pleasure of presenting a full-day pre-conference session on the Friday before SQLSaturday Austin-BI last weekend. I could spend paragraphs telling you how enjoyable and friendly and inclusive the event was. But I’d like to focus on one really cool aspect of my speaking experience: I had both closed captioning and sign language interpreters in my pre-con session.

First, let’s talk about the captions. While PowerPoint does have live captions/subtitles, that only works when you are using PowerPoint. When you show a demo or go to a web page, taking PowerPoint off the screen, you lose that ability. So we had a special setup provided by Shawn Weisfeld (Twitter|GitHub).

How the Live Captions Worked

A presenter uses a lavalier mic that sends audio to Epiphan Pearl. The presenter's computer sends video to Epiphan Pearl. Epiphan Pearl sends audio to a computer that sends audio to Azure and receives captions. The computer overlays the captions above the images from teh presenters laptop. That is all sent to the projector.
Technology setup at SQLSaturday Austin- BI Edition 2020 that provided live captions

The presenter connects their laptop to the Epiphan Pearl with an HDMI cable so they can send the video (picture) from the laptop. The speaker wears a lavalier microphone, which sends audio to the Pearl. The transcription green screen computer takes audio from the Pearl, sends it to Azure to be transcribed using Cognitive Services, and overlays the returned transcription text on a green screen input that is sent back to the Pearl. The projector gets the combined output of the transcription text and the presenter’s computer video output.

You can see an example of what it looked like from my presentation on Saturday in the tweet below. There are lots more pictures of it on Twitter with the #SqlSatAustinBI hashtag.

While this setup requires a bit more hardware, it worked so well! It took about 10 minutes to get it set up in the morning. As the speaker, I didn’t have to do anything but wear a mic. It transcribed everything I said regardless of what program my laptop was showing. There was very little lag. It seemed to be less than one second between when I would say something and when we would see it on the screen. While I try to speak clearly and slowly, sometimes I slip and fall back into speaking quickly. But the transcription kept up well. Some attendees said it was great to have the captions up on the screen to help them understand what I said when I occasionally spoke too quickly. The captions are placed at the top of the screen, above the image coming from my laptop, so I didn’t have to adjust my slides or anything to allow space for the captions.

The live captions were a big success. They helped not only people who had trouble hearing, but also those who spoke English as a second language and those who weren’t familiar with some of the terms I used and needed to see them spelled out.

Presenting With Sign Language Interpreters

This was my first time presenting with sign language interpreters to help communicate with my audience. Since the pre-con session lasted multiple hours, there were two interpreters in my room. They would switch places about every hour. They were kind enough to answer a few questions for me during breaks.

I asked them if it was difficult to sign all the technical terminology used and if they tried to study up on terms ahead of time. One of them told me that they don’t study the subject and they fingerspell all the technical terms. Most of my terms were spelled on my slides, and I saw the interpreter look at the slide to get the spelling. When someone asked a question about the font I was using, the interpreter asked me to spell it out, since it wasn’t written anywhere. I asked if having printed slides helped (I provided PDFs of the slides to the attendees at the beginning of the session). One of the interpreters told me no, because they were already watching the signer for questions and watching my slides and listening to me.

What I loved most about having the interpreters there was that the person using the service got to fully participate in the session. They asked questions and made comments like anyone else. And they participated in hands-on small group activities.

Check out this great photo of one of the interpreters in action during a small group activity.

5 people sit in a group at a table while a sign language interpreter sits across the table and helps the group communicate
Photo of small group activities during my Power BI pre-con with a sign language interpreter in the group. Photo by Angela Tidwell

Having ASL interpreters didn’t require any extra effort on my part. I didn’t have to practice with them beforehand or provide them with any of my conference materials. They were great professionals and were able to keep up with me through lecture, demos, small group exercises, and Q&A.

Sign language interpreters cost money. And they should – they provide a valuable service. In this case, the interpreters were provided by the State of Texas because the person using the service worked for the state government. Because this was training for their job, the person’s employer was obligated to provide this service. So we were lucky that it didn’t cost us anything.

While the SQLSaturday organizers were coordinating the ASL interpreters, they found out that there is a fund in Texas that can help with accessibility services when a person’s employer doesn’t/can’t provide them. It may not be the same in every state, but it’s definitely something to look into if you need to pay for interpreters for an event like this.

Make Your Next Event More Accessible

I have organized events, and I understand the effort that it requires. I’m so happy that Angela and Mike made the effort to make SQLSaturday Austin-BI a more inclusive event. I would like to challenge you to do the same for the next event you organize or the next presentation you give at a tech conference.

Your conference may not be able to afford the Epiphan Pearl (note: the original model we used is discontinued, but there is a new model) and the Azure costs. I’d like to see SQLSaturdays join together and purchase equipment and share across events – it would be great if PASS would help with this. If we can’t do that, we could always start small with the built-in capabilities in PowerPoint and work our way up from there.

It was a great experience as a speaker and as an audience member to have the live captions. And I was so happy that someone wanted to attend my session and was making the effort to sign up and request the ASL interpreters. I hope we see more of that in the future. But we need to do our part to let people know that we welcome that and we will work to make it happen.

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String Split Function in SQL Server

Published On: 2020-02-12By:

Did you know that a native STRING_SPLIT function built into SQL Server was added into SQL Server 2016? As a consultant I see so much code that call out to a scalar function that are used to split out string delimited variables into a usable list. For those that use this method I suggest you look at this function. STRING_SPLIT is a table valued function that returns a single column of your string values split out by the delimiter. This is an unusual bit of T-SQL, in that compatibility level 130 or higher is required for its use (Microsoft didn’t want to induce breaking changes into existing user code). Using this method is far more efficient and can be executed without calling  a scalar function.

The Syntax

STRING_SPLIT ( string , separator)

How to use it

SELECT value AS 'Flavor' FROM STRING_SPLIT('Chocolate,Vanilla,Strawberry', ',');

Results

The Plan

Here is what the plan looks like. It’s very straight forward and simple.

Custom Function

Now here is a home-grown version you may find in some environments. You can see its much less efficient.

/****** Object:  UserDefinedFunction [dbo].[fnSplit]    Script Date: 2/11/2020 6:26:45 PM ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

ALTER FUNCTION [dbo].[fnSplit](

    @sInputList VARCHAR(8000) -- List of delimited items

  , @sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items

) RETURNS @List TABLE (item VARCHAR(8000))



BEGIN

DECLARE @sItem VARCHAR(8000)

WHILE CHARINDEX(@sDelimiter,@sInputList,0) <> 0

 BEGIN

 SELECT

  @sItem=RTRIM(LTRIM(SUBSTRING(@sInputList,1,CHARINDEX(@sDelimiter,@sInputList,0)-1))),

  @sInputList=RTRIM(LTRIM(SUBSTRING(@sInputList,CHARINDEX(@sDelimiter,@sInputList,0)+LEN(@sDelimiter),LEN(@sInputList))))

 IF LEN(@sItem) > 0

  INSERT INTO @List SELECT @sItem

 END

IF LEN(@sInputList) > 0

 INSERT INTO @List SELECT @sInputList -- Put the last item in

RETURN

END

The Results

Results are the same. But note your field name will be the same every time, with the new function you get a little more flexibility in this.

The Plan

It’s a little more complicated then the straight forward one we saw above including a sequence.

There are many different ways to write a split function to make things work, however, now that SQL Server has given us one, I highly encourage you to take a look at it. When performance tuning be sure to take a look at what you’ve always done in your code and look for ways to improve it such as this. You can learn more and see more examples here on docs.microsoft.com.

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And sometimes we’re asked to share what we did, at events like Microsoft’s PASS Summit 2015.

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