Inspector V1.3 now available
Inspector V1.3 is now available on GitHub.
We have updated the sample report for you to play with which includes the...
2019-01-15
158 reads
Happy New Year, Here are our Most Popular Posts of 2018
Firstly, all of us at SQL Undercover would like to wish you a very Happy New Year and all the...
2018-12-31
247 reads
Quickly Compare Data in Two Tables Using CHECKSUM and CHECKSUM_AGG
There are times when we need to compare two tables and figure out if the data matches. I often see...
2018-12-31 (first published: 2018-12-18)
4,251 reads
Managing Logins and Users Across An Availability Group
What’s the deal with logins and availability groups?
I’m sure that we all, when creating a login that accesses a database...
2018-12-26 (first published: 2018-12-05)
2,292 reads
A curious case of case when and Null values
For some reason I have always written my Case statements using the following logic:
SELECT
CASE
WHEN @Priority = 1 THEN 'Very High'
WHEN @Priority...
2018-12-12 (first published: 2018-11-28)
2,835 reads
High CPU and Query Store, A Story of Spinlock Heartache
This is going to be a quick look at an issue that we recently encountered, I’m not going to go...
2018-12-04 (first published: 2018-11-20)
2,371 reads
T-SQL Tuesday – Non-SQL Server Technologies
So, this month’s T-SQL Tuesday topic is to think about a non-SQL Server technology that we want to learn.
For me,...
2018-11-15 (first published: 2018-11-06)
2,165 reads
Signing Stored Procedures That Access Multiple Databases
A while back I wrote a post, Digitally Signing a Stored Procedure To Allow It To Run With Elevated Permissions
Recently Manish...
2018-11-08 (first published: 2018-10-30)
2,575 reads
Identifying delays between SQL calls using SQL profiler
One of the common goto methods for query specific slowness which can be replicated via an application can be to...
2018-11-05 (first published: 2018-10-24)
2,230 reads
A Play Around With Table Variable Deferred Compilation in SQL 2019
Table variables, they’re nasty, dirty little things that perform about as well as a Robin Reliant in a crosswind, right? ...
2018-10-25 (first published: 2018-10-16)
2,087 reads
Blogs
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