New Built-in Function STRING_AGG() – SQL Server 2017
SQL Server 2017 introduces a set of useful functions like STRING_AGG(), STRING_SPLIT(), TRIM()… and many more. In this tip, I am...
2018-02-28
9,381 reads
SQL Geek
Who installed SQL Server?
Recently, I was working with the team and got stuck up with SQL Server Installation information. We got an urgent...
2018-02-27
17,604 reads
Change the name of master database files – SQL Server on Linux
In my recent blog, I discussed about how to move master database to another location. One of the readers requested...
2018-02-26
755 reads
How to Move Master Database to Another Location – SQL Server On Linux
With the release of SQL Server 2017 CU4, you can use the mssql-conf utility to move the master database file...
2018-03-07 (first published: 2018-02-23)
2,099 reads
Capture SQL Server Reported Errors using Extended Events
In my introduction to Extended Events blog, I mentioned that the xEvent is my favorite toy for performance troubleshooting. This blog may...
2018-03-05 (first published: 2018-02-20)
11,196 reads
Extended Event Packages
I continue blogging on extended events. Today, I will discuss about the top level containers (Package) that gives access to...
2018-01-25
514 reads
Mapping SQL Trace to Extended Events
Since I started actively participating in SQL community, I found it is very common that people will approach to seek...
2017-12-19
2,208 reads
Reset SA password on SQL Server on Linux
This article is about how to proceed when you forgot the password of your SQL Server “sa” account, Password was entered...
2017-12-11
40,296 reads
How to Get Estimated Completion Time of SQL Server Database Backup OR Restore
“How much time SQL Server is going to take to complete the database Backup or Restore” – This is one of...
2017-12-21 (first published: 2017-12-09)
34,525 reads
Introduction to Extended Events
Since I started playing with Extended Events, it has been my favorite toy for performance troubleshooting. It was introduced in...
2017-11-29
947 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
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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