Spark Delta Lake, Updates, Deletes and Time Travel
When you use delta lake there are a couple of interesting things to note based around the fact that the data is stored in parquet files which are read-only...
2020-01-20
26 reads
Extended Events Misperceptions: Profiler is Easier
I know, I know, I’m on #teamexevents so I think that Extended Events can do no wrong, but let’s address this thought that Profiler is easier. Now, if we’re...
2020-01-28 (first published: 2020-01-20)
536 reads
I’m Speaking at #SQLSatSpokane
I am super excited to announce that I have been selected to speak at SQL Saturday Spokane on March 21, 2020. Not only have I been selected to speak,...
2020-01-20
20 reads
Common commands and tasks to make dealing with Windows Core easier.
I don’t know how many of you are working with Windows Core these days but personally I think it’s a ... Continue reading
2020-01-29 (first published: 2020-01-20)
443 reads
Introducing The Undercover Catalogue
In this video, David give a quick introduction into the Undercover Catalogue.
2020-01-20
47 reads
First Time SQL Saturday Speaker Tips
A few years ago, I wrote about my first experience speaking at SQL Saturday. Recently I had a conversation with one of our first-timers speaking at SQL Saturday Rochester...
2020-01-20
20 reads
How I passed the 70-761 certification exam
FUN FACT: I have been a Microsoft Certified Professional for SQL Server for over 20 years. Second FUN FACT: the last time I took a Microsoft certification exam was...
2020-01-18
17 reads
How I passed the 70-761 certification exam
FUN FACT: I have been a Microsoft Certified Professional for SQL Server for over 20 years. Second FUN FACT: the last time I took a Microsoft certification exam was...
2020-01-24 (first published: 2020-01-18)
1,147 reads
Controlling who commits code to a given database schema in Git with Azure DevOps
One of most the fun things about working as an Advocate at Redgate is getting to help clients determine their preferred workflow for database DevOps. Teams often have unique...
2020-01-18
51 reads
Changing MaxDop For Resumable Index Create Operations
I’ll admit it, sometimes I’m wrong. Recently I blogged about the usefulness of a newer feature that was enhanced with the release of SQL Server 2019. Resumable Indexes operations...
2021-04-23 (first published: 2020-01-17)
1,321 reads
Blogs
The flight recorder: Replaying what an AI agent did on my SQL Server
By Arun Sirpal
“What exactly did it do on my server?” is the first question a DBA...
Announcements from the Microsoft Fabric Community Conference — Barcelona 2026
By James Serra
Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...
Au Revoir for now
By Steve Jones
No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...
Forums
Let's Talk Certifications
Comments posted to this topic are about the item Let's Talk Certifications, which is...
The Hidden Security Risks of Role Combination in SSAS Tabular
Comments posted to this topic are about the item The Hidden Security Risks of...
The Empty Aggregate
Comments posted to this topic are about the item The Empty Aggregate
Question of the Day
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