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Category: Versions

SQL ConstantCare Population Report for Fall 2024

Brent Ozar announces the numbers:

Every quarter, we publish adoption rate data showing how quickly people are adopting new versions of SQL Server. Today it’s time for the fall 2024 version of our SQL ConstantCare® population report.

SQL Server 2019 is still the king of the hill with almost 3X more market share than any other version!

Here’s how adoption is trending over time, with the most recent data at the right:

Every time I do this, I always lay in the caveat that this is a specific example of a specific customer base for a specific product and so there will be differences from the broader population of SQL Server/Azure SQL installations. But every time, I also say that this is still a useful indicator to review over time.

Given that Microsoft has announced SQL Server 2025, my guess is that 2022’s adoption curve will look a lot like 2017’s, where it never eclipses the prior version (2016 or 2019). Instead, companies will likely move directly to 2025 from 2019.

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What’s New in SQL Server 2025

Brent Ozar has a list:

Today at Microsoft Ignite, Microsoft announced SQL Server 2025. The biggest new features focus on AI and bringing the latest Azure SQL DB features down to your own servers. Here are the top features:

Of this list, I’m excited for regular expression support and optimized locking. On the latter, I would like RCSI to be the default, but I can understand that this would have a significant “Who moved my cheese?” factor for DBAs, and there are just enough cases when RCSI introduces actual change into an environment.

Fabric mirroring is also fine, and sp_invoke_external_rest_endpoint is something that can be useful, not just for making external calls. As for storing vector data, I will want to see its performance—both in terms of how quickly it loads & retrieves data, as well as how accurate the results are—before I get too excited. DiskANN is a good algorithm and it’s in Cosmos DB right now, but I haven’t been that impressed with the quality of results so far from it in Cosmos.

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Learn from Developer Edition rather than Express Edition

Vlad Drumea learns the right way:

It’s free for non-production use

Just like SQL Server Express Edition, Developer Edition is free, but, unlike Express, it’s only free for non-production purposes (developing, testing, demoing, learning).

If you want to learn more about this, Bob Ward has a blog post that covers this in-depth and answers some questions that people tend to have about Developer Edition.

Back in the day, Developer Edition used to cost money—something like $50, so not much, but just enough to make people prefer Express Edition. Those days are long gone, however.

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New Permissions and Database Roles in SQL Server 2022

Lori Brown builds a list:

Well…..I just learned about these and thought that it would be good to understand them a little more and have some links to read more about them.  I honestly don’t have a lot of SQL 2022 servers in our customers SQL estate, so this has flown under the radar for me.  This will be an attempt to put some spread-out information in a one-stop shop.

Click through for a table with information on roles, as well as lists for permissions.

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First Thoughts on SSMS 21

Reitse Eskens shares some thoughts:

It’s been a long time coming, but all of a sudden there were a number of posts from Microsoft announcing the first preview of SQL Server Management Studio 21. This is big as it’s quite the overhaul from the SQL Server Management Studio we’re used to.

To give you some idea, here are my first impressions.

Vlad Drumea also takes a peek:

SQL Server Management Studio 21 Preview 1 was released 2 days ago, so I took it out for a spin and here are my first impressions so far.

Read on to see what’s in the preview today, some of the new functionality, and whether SSMS 21 is faster than SSMS 20.

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Apache Kafka 3.9 Now Available

Colin McCabe announces Apache Kafka 3.9:

We are proud to announce the release of Apache Kafka 3.9.0. This is a major release, the final one in the 3.x line. This will also be the final major release to feature the deprecated Apache ZooKeeper® mode. Starting in 4.0 and later, Kafka will always run without ZooKeeper.

That’s a pretty big change, but there are also quite a few other significant changes here to check out.

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Updates in .NET 9

Ajay Jajoo tells us what’s new:

One of the standout features of .NET 9 is its focus on performance. With numerous optimizations across the runtime and libraries, applications can expect faster execution times and reduced memory usage. This is particularly beneficial for high-load applications, making .NET 9 an ideal choice for cloud-based solutions.

.NET 9 brings various performance optimizations, including improvements in garbage collection and just-in-time (JIT) compilation.

If you work at all with C#, you’ll see some quality of life improvements in .NET 9. But given Microsoft’s policy around short-term and long-term releases, you might wait until .NET 10 in many corporate environments to see them.

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Migrating to Azure PostgreSQL Flexible Server from Single Server

Josephine Bush performs a migration:

Why Migrate to Flexible Server?

  • High availability and disaster recovery: Flexible Server provides higher availability with zone-redundant architecture.
  • Customizable maintenance windows: More control over when updates and maintenance tasks occur.
  • Performance improvements: Fine-tuned scaling and performance adjustments without downtime.
  • Enhanced security: With VNet integration and more advanced networking options.

Read on to learn more about by when you have to migrate and how you can perform the migration.

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Online DR from SQL Server 2022 and Azure SQL MI Now Available

Djordje Jeremic announces general availability of one of the key selling points from SQL Server 2022:

Today, we are announcing the general availability of the following two major capabilities of the Managed Instance link feature with SQL Server 2022:

  • Two-way failover between SQL Server 2022 and SQL Managed Instance through the link to unlock true disaster recovery (DR) with Azure
  • Creating a link from SQL Managed Instance to SQL Server 2022 to unlock off-PaaS data mobility for regulatory and dev/test scenarios 

Click through for more detail.

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Cardinality Estimation Changes Post-SQL Server 2014

Brent Ozar reminds us that small changes happen:

About 10 years ago, Microsoft made changes to the Cardinality Estimator (CE) which caused some problems for SQL Server upgrades. When folks upgraded to SQL Server 2014, they also casually switched their databases’ compatibility level to the latest version, because for years that hadn’t really affected query plans. They just figured they wanted the “latest and greatest” compat level, without regard to the effects. That backfired badly when they suddenly got 2014’s Cardinality Estimation changes.

So for several years, whenever someone upgraded from older versions, and they complained about performance, the stock community answer was, “Change your compatibility level back to what it used to be.” In many cases, that just solved the problems outright, leading to blog posts like this and this.

Even today on SQL Server 2019 & 2022, this advice is still relevant! If you mess around with compatibility levels, you can absolutely change cardinality estimations in ways you didn’t expect.

Read on for more information, including examples where cardinality estimation has improved with SQL Server 2022 and where it has gotten worse.

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