Watching the Sands of Suggestion in #SQLPrompt
I enjoy themes, and when I ran across the SQL Prompt Treasure Island, I had to take a few minutes...
2018-05-04 (first published: 2018-04-24)
2,515 reads
Blog Posts
Day 3: MySQL Architecture
Like other RDBMS MySQL also has similar architecture: Connection Layer/Application Layer Logical Layer (Processing) Storage Engine Layer (Physical) – special Connection...
2018-05-03
318 reads
dbachecks – Setting temporary configuration values
dbachecks has seen the light about two months ago. As I'm writing this blog post, the module counts with more...
2018-05-03 (first published: 2018-04-24)
1,982 reads
Setting Windows To Prefer IPv4 Over IPv6
This post is a bit different from my usual SQL Serer posts, I recently hit a problem where a legacy...
2018-05-03
515 reads
The Forgotten Fourth SQL Server Recovery Model
SQL Server recovery models define when database transactions are written to the transaction log. Understanding these models is critical for...
2018-05-03 (first published: 2018-04-24)
2,987 reads
5 Ways to Examine Cardinality Metrics
In SQL Server the query optimizer uses a cardinality estimator to answer data SELECTIVITY questions like the ones below. The...
2018-05-02
398 reads
Azure SQL Data Warehouse Gen2 announced
Monday was announced the general availability of the Compute Optimized Gen2 tier of Azure SQL Data Warehouse. With this performance optimized tier, Microsoft...
2018-05-02
526 reads
Azure SQL Data Warehouse Gen2 announced
Monday was announced the general availability of the Compute Optimized Gen2 tier of Azure SQL Data Warehouse. With this performance optimized tier, Microsoft...
2018-05-02
196 reads
Database Files Down The Wrong Path
I manage a few servers used to host SQL Instances for development and test purposes. Each of those instances hosts...
2018-05-02 (first published: 2018-04-24)
2,976 reads
Dates and Times in SQL Server: What about TIMESTAMP?
It occurred to me that we haven’t covered the TIMESTAMP data type in this series about dates and times. TIMESTAMP...
2018-05-02
284 reads
Blogs
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, which is...
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