Index Black Ops Series
Previously, in a TSQL2sDay index summary post, I started a series on the DMV sys.dm_db_index_operational_stats. The series investigates how the...
2011-03-26
858 reads
DevWeek 2011 – Day 1
Unfortunately, I couldn’t be in two places at one time, there were two tracks dedicated to the SQL Server DBA...
2011-03-25
727 reads
OUG Back to Basics Event – London Mar 2011
First Things First
At UKOUGs’ Back to Basics Special Event held in London today (Mar 24th), Niall Litchfield presented a very worthwhile...
2011-03-25
628 reads
Why I don’t like NULLs and Nullable Columns
As I imagine (or hope), the majority of us adhere to some form of standards in the environment that they...
2011-03-25
761 reads
How Many Bytes Are In My Column? – T-SQL Functions
One of the things you want to be aware of when writing T-SQL is using the proper function for a...
2011-03-25
4,063 reads
The Mystery Of The Slow Last Row
Things Go South
Recently I was troubleshooting a piece of software that archives data out of a very active import table....
2011-03-25
1,699 reads
NOLOCK for Developers
What is NOLOCK?
NOLOCK is a table hint for SQL Server that tells the engine to not take locks and ignore...
2011-03-25
1,774 reads
An Analogy is like a Tree….
For years, I’ve been trying to express how everything ties into everything else. A big part of understanding any given...
2011-03-25
496 reads
So you’re RAIDed, but are you protected?
G’day,
Occasionally, I hear things that surprise me. And one of the statements that I’ve heard lately that fits into that category is...
2011-03-24
402 reads
Tools note
I was asked a few months ago to allow some advertising on my blog. I hadn’t given the idea a whole lot of thought but was reminded again today...
2011-03-24
13 reads
Blogs
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...
Au Revoir for now
By Steve Jones
No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...
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