The Challenge of Deleting Data
Removing data from your systems isn't as easy as you might think. It is especially important to be aware when you are doing this for compliance.
A Version Control Strategy for Database DevOps
This article explains step one: migrating our monolithic, centralized repos to Git, then implementing a Release Flow branching strategy for parallel development work streams, and a Pull Request workflow to control an automated build and release process.
SQL Server Function Examples with JSON Files
This tip drills down on how to process JSON files with SQL Server and demonstrates an approach for extracting key values from JSON nested key-value pairs.
The Power of Community in Times of Uncertainty
The last two weeks have brought a (seemingly) daily deluge of difficult news in the tech sector. Microsoft, Google, Facebook, and Amazon have all had significant layoffs with many friends in the #SQLFamily and data community being impacted. In times of uncertainty and heightened anxiety, it’s essential to have a group you can turn to […]
Learning Leads To Learning
I am an amateur radio operator. In the US this is commonly referred to as a ham, or a ham radio operator. My call sign is KC1KCE, as issued by the US government through the FCC. And yeah, I can hear you now, a ham is the geek equivalent of a cross-fitter. How do you […]
The Cost of Employee Turnover
Culture is important retaining employers. Companies are finding this more valuable every day.
Verifying Trees
In this article, Glen Cooper provides code that allows you to process a tree, or undirected graph of data. Lots of hierarchies fall into this category and the ability to process them is valuable in many reporting situations.
SQL Server point in time recovery
In this article, we look at how to do a point in time restore using TSQL and SSMS to recover a database to a particular point in time.
Knowing Your Technologies
When faced with choices, it's important to understand the capabilities and limitations of your options.
Blogs
T-SQL Tuesday #180: Good enough is perfect
How can you achieve good enough without compromising the process/product? In the world of...
How to Convert FileTime to DateTime
By Patrick
One of my customers recently wanted to rename each of the SQL audit files...
The pros and cons of self-service BI: What every industry leader should know
The post The pros and cons of self-service BI: What every industry leader should...
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