Farewell Brook Ranne
For members of the SQL community in Orlando and Chicago you’ve probably heard that Brook Ranne died on March 29,...
2014-04-15
682 reads
Andy Warren
SQLServerCentral Editorial: Doing What It Takes To Get The Job Done
I wrote Doing What It Takes To Get The Job Done about a conversation with my nephew working late to...
2014-04-15
435 reads
Writing a Question Of The Day–More Notes
Today I wrote another question based on an error message. I included the error message in the question this time...
2014-04-15
479 reads
It’s Not All About The Keys–Question Of The Day
My latest question is live today, called It’s Not All About The Keys. It’s a three pointer, if score matters...
2014-04-14
431 reads
2014-04-14
2,253 reads
Quarterly Goals
Over time I’ve settled on quarterly goals as the best way to focus on the stuff I most want to...
2014-04-11
526 reads
Simple And Amusing Question Of The Day
I was working on a script today to check the range of some values and trying to take the time...
2014-04-11
569 reads
Writing My Next Question Of The Day
I ran into a simple error last week and saved it to convert to a question. It’s another one where...
2014-04-07
561 reads
Follow Up To A Questionable Trigger
This question of the day didn’t turn out well at all – required too big a leap the way it was...
2014-04-04
497 reads
SQLServerCentral Editorial: Team Reputation
Maybe too serious a topic for a Friday, I wrote Team Reputation because I like working for good teams – who...
2014-04-04
596 reads
Blogs
AI Innovation in Microsoft Keynote
By Chris Yates
I’m thrilled to be covering the Microsoft Keynote: Fuel AI Innovation with Azure Databases on Day...
Benefits of Migrating from Azure Synapse Analytics to Microsoft Fabric
By James Serra
Many customers ask me about the advantages of moving from Azure Synapse Analytics to...
PASS Summit 2024 – A Very Different World
By Brian Kelley
The last data centric conference I attended was the PASS Summit in 2019. A...
Forums
What's New for the Microsoft Data Platform
Comments posted to this topic are about the item What's New for the Microsoft...
Using Outer Joins
Comments posted to this topic are about the item Using Outer Joins
Question of the Day
Using Outer Joins
I have this data in a SQL Server 2019 database:
Customer table CustomerID CustomerName 1 Steve 2 Andy 3 Brian 4 Allen 5 Devin 6 Sally OrderHeader table OrderID CustomerID OrderDate 1 1 2024-02-01 2 1 2024-03-01 3 3 2024-04-01 4 4 2024-05-01 6 4 2024-05-01 7 3 2024-06-07 8 2 2024-04-07I want a list of all customers and their order counts for a period of time, including zero orders. If I run this query, how many rows are returned?
SELECT c.CustomerName, COUNT(oh.OrderID) FROM dbo.Customer AS c LEFT JOIN dbo.OrderHeader AS oh ON oh.CustomerID = c.CustomerID WHERE oh.Orderdate > '2024/04/01' GROUP BY c.CustomerNameSee possible answers