Find Queries Using a Key Lookup Operator
While teaching about Extended Events and Execution Plans last week, Jason, one of the people in the class, asked: Is there a way in Extended Events to find queries...
2021-06-14
19 reads
The Scary DBA
Database Fundamentals #30: Create Foreign Keys With T-SQL
You can create foreign keys using TSQL roughly the same way as you created primary keys. You can either use the ALTER TABLE statement to add the foreign key,...
2021-06-07 (first published: 2021-05-24)
440 reads
Database Fundamentals #30: Create Foreign Keys With T-SQL
You can create foreign keys using TSQL roughly the same way as you created primary keys. You can either use the ALTER TABLE statement to add the foreign key,...
2021-05-24
12 reads
Query Compile Time
A question that came up recently was how to track the query compile time. It’s actually a pretty interesting question because, there aren’t that many ways to tell how...
2021-05-19 (first published: 2021-05-10)
544 reads
Query Compile Time
A question that came up recently was how to track the query compile time. It’s actually a pretty interesting question because, there aren’t that many ways to tell how...
2021-05-10
13 reads
Query Store on Azure SQL Database
Under the covers, Azure SQL Database is just good old fashioned SQL Server and this includes Query Store on Azure. While many things can be different when working with...
2021-05-14 (first published: 2021-05-03)
218 reads
Using Extended Events Live Data With Azure
In my last post I showed some shortcomings of Extended Events, however, it is possible to use Live Data with Azure. Let’s explore exactly how that works. To get...
2021-04-26
38 reads
Extended Events and Azure SQL Database
Knowledge of how your system behaves is vital to better control, maintain, and grow the system. While Azure provides all sorts of wonderful assistance within Azure SQL Database, you’re...
2021-04-22 (first published: 2021-04-19)
217 reads
A Year of “Good Morning!”
Just a little over a year ago, I started posting a “Good Morning!” tweet on Twitter every work day. I’ve kept it up for over a year and I’d...
2021-04-06
117 reads
Extended Events: Embrace the XML
While XML is, without a doubt, a giant pain in the bottom, sometimes, the best way to deal with Extended Events is to simply embrace the XML. Now, I...
2021-04-12 (first published: 2021-04-05)
248 reads
Blogs
How to Clear the SSMS Cache (SSMS 21 and Later)
By SQLPals
How to Clear the SSMS Cache (SSMS 21 and Later) Updated...
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...
Forums
Let's Talk Certifications
Comments posted to this topic are about the item Let's Talk Certifications
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