Auto-Tuning and the #1 Mindset Problem I Had as a DBA
A few folks have asked: will auto-tuning and adaptive query plans mean the end of performance tuning jobs for SQL Server? In this week’s episode, I talk about why...
2017-12-04
1 reads
Slowing Down Your Motor Mouth – Presentation Tips for Fast Talkers
Are you worried that you talk too fast when you give a speech, talk, or presentation? Is fear being a fast-talker one of the concerns that keeps you from...
2017-11-20
#TSQL2SDAY 96 – Kalen Delaney’s Inspiration for Adventure
This post is part of TSQL Tuesday, a monthly blog party. You’re welcome to join in this party: if you’d like email notifications of future topics, here’s how to...
2017-11-14
Things I Learned from Speaker Idol 2017 at the SQL PASS Summit
I was lucky enough to serve as a judge for the Speaker Idol competition at the SQL PASS Summit conference this year. One of the great thing about watching...
2017-11-09
I Thought I Was An Introvert. Turns Out I Was Anxious as #@*] (Dear SQL DBA Episode 53)
In this week’s episode, I’m not answering a reader’s question. Instead, I’m talking about my personal experience with anxiety. This episode touches on on healthcare, religion, and squishy emotions...
2017-11-08
1 reads
SQL PASS Summit 2017 Day 2 – Keynote Notes and Ideas
This morning, Dr Rimma Nehme tells us the story of the birth of Azure Cosmos DB, a global, scale-out database system. At the beginning of the talk, I can already...
2017-11-02
5 reads
SQL PASS Summit 2017: Day 1 Keynote Thoughts and Memories
Whee! It’s the first day of the main SQL PASS Summit conference and I made it to the keynote early for the first time ever. The hype says we’re going...
2017-11-01
The Death of SQL Server Service Packs
SQL Server Service Packs are going away, starting with SQL Server 2017. I talk about why I think this is a good thing, and discuss Cumulative Updates, Service Packs,...
2017-10-06
Love and Hate for SSMS
People have strong feelings about SQL Server Management Studio: they love it AND they hate it. In this week’s episode, I talk about why people have such conflicting feelings...
2017-09-29
3 reads
How Do I Analyze a SQL Server Execution Plan?
A query is slow, and you figure out how to collect the query execution plan. Now what? In this video, I talk “big picture” about what execution plans are,...
2017-09-22
37 reads
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