SQL Homework – October 2019 – Code review (self and peer)
Every database person I’ve ever met writes at least some code at some point in their career. That code might ... Continue reading
2019-10-14 (first published: 2019-10-02)
551 reads
Book Announcement – Query Store for SQL Server 2019
After nearly a year of work, starting with the proposal that I finished writing in a hospital last year the book is finished and off to be published and...
2019-10-02
11 reads
Book Announcement – Query Store for SQL Server 2019
After nearly a year of work, starting with the proposal that I finished writing in a hospital last year the book is finished and off to be published and...
2019-10-02
15 reads
Book Announcement – Query Store for SQL Server 2019
After nearly a year of work, starting with the proposal that I finished writing in a hospital last year the book is finished and off to be published and...
2019-10-02
47 reads
How to test ETL Processes in production
This is the final part in the four-part series into testing ETL pipelines, how exciting!
Part 1 - Unit Testing https://the.agilesql.club/2019/07/how-do-we-test-etl-pipelines-part-one-unit-tests/ Part 2 - Integration Testing https://the.agilesql.club/2019/08/how-do-we-prove-our-etl-processes-are-correct-how-do-we-make-sure-upstream-changes-dont-break-our-processes-and-break-our-beautiful-data/ Part 3...
2019-10-02
14 reads
How to test ETL Processes in production
This is the final part in the four-part series into testing ETL pipelines, how exciting!
Part 1 - Unit Testing https://the.agilesql.club/2019/07/how-do-we-test-etl-pipelines-part-one-unit-tests/ Part 2 - Integration Testing https://the.agilesql.club/2019/08/how-do-we-prove-our-etl-processes-are-correct-how-do-we-make-sure-upstream-changes-dont-break-our-processes-and-break-our-beautiful-data/ Part 3...
2019-10-02
143 reads
Why Does Everyone Have More Friends Than You?
No, the answer isn’t because you’re a DBA. This isn’t a technical post about databases, but rather a discussion of a statistical paradox that I read about recently. Statistics...
2019-10-01
51 reads
We Thought That Sean McCown’s SMO Tutorial Was So Good, It Needed To Be A Video In It’s Own Right
Back in February, Sean McCown joined us on the Undercover podcast and presented a brilliant tutorial on the SMO. We thought that it was so good that we’ve decided...
2019-10-01
63 reads
More “Wrong” SQL Server Math – Floating Point Errors
Watch this week’s episode on YouTube. Last week we looked at how implicit conversions and datatype precedence can cause SQL Server to output unexpected results (if you aren’t aware of how...
2019-10-01
370 reads
More "Wrong" SQL Server Math - Floating Point Errors
Watch this week's video on YouTube
Last week we looked at how implicit conversions and datatype precedence can cause SQL Server to output unexpected results (if you aren't aware of how it...
2019-10-01
33 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