I often use the procedure sp_set_firewall_rule to set firewall rules for Azure SQL Server. (There’s a similar call to set the firewall for databases). The other day though, I got an error that had me puzzled:
I also tried it with named parameters and got the same error.
When I looked at my previous scripts, I realised that I had used a Unicode string for the first parameter previously.
2021-08-25
I’m really pleased to let you know that our latest online on-demand course is now released:
Advanced T-SQL for Developers and DBAs
To celebrate the release, you can get 25% off the pricing until Aug 14th by using coupon code ATSRELEASE
We’ve had so many requests from customers to bring this course to our online platform. It was always one of our most popular in-person courses, and it’s now released and fully updated.
2021-07-26
I often need to write scripts that drop and recreate databases. The hard part of that has always been reliably dropping a database if it already exists. And no, you wouldn’t think that would be hard, but it is.
T-SQL has a built-in command for this.
DROP DATABASE IF EXISTS Sales;
You’d hope that would work, but it doesn’t. I wish it did. The problem is that it will fail if anyone is connected to the DB. And to check if anyone is attached, you first need to check if the DB exists, so it makes the whole “IF EXISTS” part that was added to this command, completely pointless.
2021-06-24
It’s been a while coming, but my latest book is now out. Implementing Power BI in the Enterprise is now available in both paperback and eBook. The eBook versions are available in all Amazon stores, and also through most book distributors through Ingram Spark distribution.
I’ve had a few people ask about DRM-free ePub and PDF versions. While the Kindle version on Amazon is their normal DRM setup, you can purchase the DRM free version directly from us here:
2021-06-18
If you follow anyone that’s part of Microsoft’s MVP program, you might have heard there has been a global cloud skills challenge happening lately: #TheMVPChallenge.
There were three challenges that each of us could complete:
You can imagine which one I chose to complete. I did the Azure Data and AI challenge. Data and AI are a pretty common grouping.
2021-05-07
Camtasia is one of my favourite products. I use it regularly. I’ve been so excited to start to get to use Camtasia 2021 that was released just recently. It’s a nice step up from an already great product.
But what I didn’t like after upgrading, is that every time I started Camtasia, instead of the “normal” editing screen, I got a cutesy little popup that asked me what I wanted to do with the product today.
2021-04-30
This is a post in the SQL Interview series. These aren’t trick or gotcha questions, they’re just questions designed to scope out a candidate’s knowledge around SQL Server and Azure SQL Database.
Section: Development Level: Medium
Question:
UNION and UNION ALL are commonly used to combine two sets of rows into a single set of rows.
EXCEPT is another set operator.
Can you explain what it does?
Answer:
EXCEPT is used to remove any rows in the first set of rows, if the same rows appear in the second set.
2021-04-29
Azure SQL (both Azure SQL Database and Azure SQL Managed Instance) both have different password complexity rules to SQL Server. I was reading an email discussion list and a poster asked where he could find the list of password complexity rules for Azure SQL. I said I’d never seen a list.
Well it turns out that there is a list, but not where you might have thought to look. They’re spelled out in this article:
2021-04-28
This is a post in the SQL Interview series. These aren’t trick or gotcha questions, they’re just questions designed to scope out a candidate’s knowledge around SQL Server and Azure SQL Database.
Section: Server Tuning Level: Advanced
Question:
SQL Server 2008 introduced a server option for optimize for adhoc workloads.
Can you explain the problem that it is designed to solve, what most commonly causes the problem, and what impact this option has when you enable it?
2021-04-27
In my last T-SQL 101 post, I described the CASE statement. Until SQL Server 2012, that was the only real option that we had for choosing between alternate values. In SQL Server 2012, Microsoft gave us another option with the IIF function.
The IF function is very similar to the IF function in Microsoft Excel. It takes three parameters:
In the main image above, you can see the equivalent CASE statement and the simplified IF function equivalent.
2021-04-26