How to Measure IO Latency for Database Files in SQL Server
In order to get information about the amounts of PHYSICAL reads we perform on database files, SQL Server exposes a...
2015-04-08
1,370 reads
Matan Yungman
Can Log Shipping Work Without Shipping the Log?
When you configure log shipping, there are 4 SQL Server Agent jobs that are set up:
Backup: Performs a backup log...
2015-04-02 (first published: 2015-03-30)
6,902 reads
SQLRally and SQLBits Slides and Demos
It’s been a great a busy week.
On Wednesday, I presented my session, “Query Progress Tracking in SQL Server” at SQLRally...
2015-03-06
609 reads
How to Fix Latch Problems when Working with Ascending Keys in SQL Server
Traditionally, we want our Clustered Index to have the following attributes:
Narrow: So that our clustered index and the non-clustered indexes that point...
2015-03-03
681 reads
Speaking at SQLBits and SQLRally
Next week, I’m going to visit London and Copenhagen for SQLBits and SQLRally Nordic. It’s going to be intense and...
2015-02-24
461 reads
The Data Loading Performance Presentation
This Monday, at SQLSaturday Israel, I presented my new session, “The Data Loading Performance Presentation”.
I worked on the session a...
2015-01-21
564 reads
What to Expect When Transitioning from DBA to Consultant
Last week, Boris Hristov (b|t), the organizer of #SQLHangout, invited William Durkin (b|t) and me to a SQL Hangout about transitioning...
2015-01-15
572 reads
Things I Learned in 2014
2015 is here!
Last year I wrote about what I had learned in 2013, and I try to make it a...
2015-01-06
766 reads
Rebuilding and Reorganizing Clustered Columnstore Indexes
Clustered Columnstore Indexes, as well as “regular” indexes, support the Rebuild and Reorganize operations. However, the meaning of those operations...
2014-12-16 (first published: 2014-12-11)
6,826 reads
Tracking Progress of SQL Server Index Builds and Rebuilds
Let’s say you build or rebuild an index in SQL Server. Your users and boss are anxious to know when...
2014-11-11 (first published: 2014-11-06)
8,444 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