Stairway to Azure SQL Hyperscale – Level 2: Page Server Architecture Explained
In Level 2 of the Stairway to Hyperscale, we learn about Page Servers in more detail.
2025-09-17
930 reads
Stairway Series
Introduction of Azure SQL Hyperscale: Stairway to Azure SQL Hyperscale Level 1
In Level 1 of the Stairway to Azure SQL Hyperscale, we learn about the architecture and create a hyperscale instance.
2025-09-03
4,780 reads
Stairway to Snowflake Level 8 - Event Tables
In this next level of the Stairway to Snowflake, we delve into Event Tables. These are used to capture telemetry from your Snowflake database.
2025-07-02
770 reads
Stairway to Snowflake Level 7 - Snowflake Tables
In this next level of the Stairway to Snowflake we examine the wide variety of table types that exist in the platform.
2025-06-13 (first published: 2025-05-21)
1,721 reads
Level 6 of the Stairway to Synapse Analytics: Dedicated SQL Pool
This next level of the Stairway to Synapse Analysis Services looks at the Dedicated SQL Pool.
2025-06-06 (first published: 2025-05-07)
785 reads
Stairway to Snowflake Level 5 - Using Snowflake with SnowSQL and Visual Studio Code
Snowflake has its own CLI tool: SnowSQL. In this level of the Stairway Series learn how to work with this dialect in Snowflake and Visual Studio Code.
2025-06-13 (first published: 2024-11-20)
2,203 reads
Stairway to Snowflake Level 6 - Creating and Cloning Snowflake Databases
In this next level of the Stairway to Snowflake, learn about creating and dropping databases, with some options for cloning from different sources.
2025-06-13 (first published: 2025-01-15)
2,511 reads
Level 4 of the Stairway to Synapse Analytics: Create and Use a Delta Lake
Introduction In Level 1 of this series, I discussed Synapse Analytics basics and the steps for creating the Synapse Workspace. In Level 2, we analyzed Data Lake files using the Serverless SQL Pool. In Level 3, we analyzed Data Lake files using the Spark Pool. In Levels 4 and level 5, I will discuss the Delta […]
2025-06-06 (first published: 2024-12-18)
2,052 reads
Stairway to Snowflake Level 4 - Introducing Snowsight, Snowflake’s Web UI
This next level of the Stairway to Snowflake looks at the Snowsight UI and what you can accomplish with it.
2025-06-13 (first published: 2024-10-23)
2,005 reads
Stairway to Database Containers Level 4: Using a Docker Compose File
In the next level of the Stairway to Database Containers, let's learn to use a compose file to specify a number of options for our container.
2024-08-28
1,231 reads
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Let's Talk Certifications
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The Hidden Security Risks of Role Combination in SSAS Tabular
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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