Table variables can cause performance issues with joins when they contain a large number of rows. In SQL Server 2019, Microsoft has improved how the optimizer works with table variables which can improve performance without making changes to your code. In this article, Greg Larsen explains how this feature works and if it really does make a difference.
2020-06-22
Phil Factor demonstrates a cunning way to test stored procedures or functions, such as after refactoring, by storing the 'before' and 'after' results in views and then using SQL Data Compare to spot any discrepancies.
2020-06-22
You want to check for corruption, but you don’t want to slow down your primary production server. In this post, I’m specifically talking about offloading the corruption checking process. I’m not talking about doing corruption checking on both the primary and other servers – that’s wonderful, and if you’re doing that, you should hug yourself. You’re doing a good job. Who’s a good dog? You are! Good dog.
2020-06-19
Distributed workforces have very quickly become the norm. The 2020 State of Database Monitoring survey explores the impact of remote working on estate management and how organisations are responding. You can read the full findings in the free report, here.
2020-06-19
Get a basic introduction to Terraform by deploying and removing SQL Servers and a failover group to Azure.
2020-06-18
5,870 reads
Microsoft introduced Columnstore with SQL Server 2012 and have improved the feature in every version since then. You may be wondering why they are different than traditional indexes and how they work. In this series, Edward Pollack explains the architecture of Columnstore indexes. In future articles in the series, he will describe best practices for Columnstore.
2020-06-18
Database deployments are on the rise, with more organizations releasing weekly or daily. But this does not always result in more value being delivered. Steve Jones advises the steps you can take to unlock the value of frequent releases in this blog.
2020-06-18
In this article we look at how to find SQL Server deadlocks using the system health Extended Events session.
2020-06-17
Could you spare 3 minutes to help us out at SQL Server Central? Take this short survey, tell us about who you are and why you come to SQL Server Central, and you could win a $50 Amazon voucher.
2020-06-17
A simple question, and you can vote by leaving a comment for this article. Do you still want me to include the coping tips in the newsletter after June? When the pandemic shut down much of the world in March, our CEO at Redgate Software asked us to think about what we could do to […]
2020-06-16
700 reads
By SQLPals
How to Clear the SSMS Cache (SSMS 21 and Later) Updated...
By Arun Sirpal
“What exactly did it do on my server?” is the first question a DBA...
By James Serra
Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...
Comments posted to this topic are about the item Let's Talk Certifications
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Comments posted to this topic are about the item The Empty Aggregate
I have this table in a SQL Server 2025 database:
CREATE TABLE [dbo].[CustomerOrder] ( [OrderID] [int] NULL, [CustomerID] [int] NULL, [total] [money] NULL ) ON [PRIMARY] GOWhat is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
COUNT(total) AS count
FROM dbo.CustomerOrder;
See possible answers