Joining on NULLs
Watch this week's video on YouTube
It's important to be aware of columns that allow NULL values since SQL Server may handle NULLs differently than you might expect.
Today I want...
2019-03-26
16 reads
Bert Wagner
Joining on NULLs
Watch this week's video on YouTube
It's important to be aware of columns that allow NULL values since SQL Server may handle NULLs differently than you might expect.
Today I want...
2019-03-26
14 reads
4 Reasons To Avoid VARCHAR(8000)
Watch this week’s episode on YouTubeWhen first learning SQL Server, I had the brilliant idea of defining every column on...
2019-04-05 (first published: 2019-03-19)
1,620 reads
4 Reasons To Avoid VARCHAR(8000)
Watch this week's video on YouTube
When first learning SQL Server, I had the brilliant idea of defining every column on my table as VARCHAR(8000). After all, the VARCHAR datatype...
2019-03-19
17 reads
4 Reasons To Avoid VARCHAR(8000)
Watch this week's video on YouTube
When first learning SQL Server, I had the brilliant idea of defining every column on my table as VARCHAR(8000). After all, the VARCHAR datatype...
2019-03-19
17 reads
Gaps and Islands Across Date Ranges
Watch this week’s episode on YouTube.In a traditional gaps and islands problem, the goal is to identify groups of continuous...
2019-03-12
7,604 reads
Gaps and Islands Across Date Ranges
Watch this week's video on YouTube
In a traditional gaps and islands problem, the goal is to identify groups of continuous data sequences (islands) and groups of data where the...
2019-03-12
39 reads
Gaps and Islands Across Date Ranges
Watch this week's video on YouTube
In a traditional gaps and islands problem, the goal is to identify groups of continuous data sequences (islands) and groups of data where the...
2019-03-12
6 reads
Dipping into the Cookie Jar
This post is a response to this month’s T-SQL Tuesday #112 prompt by Shane O’Neill. T-SQL Tuesday is a way for the SQL...
2019-03-29 (first published: 2019-03-12)
293 reads
Dipping into the Cookie Jar
This post is a response to this month's T-SQL Tuesday #112 prompt by Shane O'Neill. T-SQL Tuesday is a way for the SQL Server community to share ideas about different database and...
2019-03-12
11 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