Coaching the Digital Transformation
Helping your business get value from a digital transformation can start within your own team or group.
A Simple Example of Flyway Development using GitHub Branching
This article demonstrates one way to do branch-based database development with Flyway, using GitHub to manage the branches and Flyway configuration files to allow Flyway to switch smoothly between databases, when we move between branches in GitHub.
Index Types in PostgreSQL: Learning PostgreSQL with Grant
In this article I’m going to go over the different types of indexes and some index behaviors. We’ll get into what the indexes are, how they work, and how best you can apply them within your databases. I’m hoping you’ll develop an understanding of which indexes are likely to work better in each situation.
Fear of "What If"
Fear and aging. Two of the things that most human beings have in common is that we are scared and getting older. Most of us we fear getting older, but that is a very different conversation altogether. I want to talk about the fear of what if. Today I have two things I am keenly […]
Outsourcing Operations
When I first started working in technology in the 90s, it was a time of outsourcing lots of work overseas. Many large companies followed the wave of manufacturing in the 70s and 80s by many companies, including lots of semi-conductor manufacturers. I watched as a number of jobs moved overseas, though fortunately not mine. In […]
Privileges and Roles in SQL Server, Oracle and PostgreSQL - Part 1
This tip will review the different ways of granting privileges in SQL Server, Oracle, and PostgreSQL, the differences in the concepts of roles, schemas, and owners, and the way to grant permissions on the whole schema.
Schedule Jobs on a Clustered SQL Server
In this article, you will learn how you can schedule jobs in a clustered environment that will only execute on the primary node.
The Complexity of Metrics
We need to monitor our servers, but individual metrics have more complexity than just setting simple limits for their readings.
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