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
776 reads
Chandan Shukla
Revisiting SQL Server Window Functions- A Practical Walkthrough
A look at window functions in SQL and how they can be used to query data without the restrictions of a GROUP BY.
2025-09-12
6,756 reads
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
3,712 reads
Advanced SQL Server Page Forensics: Detecting Page Splits and Allocations with DBCC PAGE
Page splits are an often-overlooked performance killer in SQL Server. In this article, we take a forensic look at how serial inserts differ from mid-table inserts, revealing why inserting rows out of order causes hidden page splits, increased IO, and fragmentation. Using a wide-column table, we demonstrate both scenarios and decode their impact with page-level analysis.
2025-09-02 (first published: 2025-08-05)
2,502 reads
Deprecated but Forgotten: Why SQL Server’s Text, NText, and Image Data Types Still Haunt Your Systems
TEXT, NTEXT, and IMAGE columns have been deprecated for nearly two decades, yet they still silently haunt many SQL Server environments. This article explains their hidden limitations with practical demos and shows why migrating to VARCHAR(MAX), NVARCHAR(MAX), and VARBINARY(MAX) is critical for modern performance, maintainability, and future upgrades.
2025-09-02 (first published: 2025-08-06)
2,357 reads
How to safely and surgically restore filegroups
Most DBAs are familiar with full and differential ...
2025-09-02 (first published: 2025-08-01)
901 reads
What is Delayed Durability in SQL Server — And Should You Turn It On?
Learn about delayed durability in SQL Server and how it might help you with a heavily loaded server.
2025-08-29
8,479 reads
From Rows to Pages: The Hidden Chaos Behind SQL Server’s Sampling Methods
Learn about the TABLESAMPLE option in T-SQL and uncover some of the pitfalls of assuming this works as you think it does.
2025-08-22
2,122 reads
How a Legacy Logic Choked SQL Server in a 30-Year-Old Factory
When a SQL Server Express-based factory app started crawling, the culprit wasn’t hardware or network — it was a decades-old WHILE loop migrated from C/C++ to SQL. This real-world story breaks down how procedural habits, memory grants, and lack of window functions nearly derailed a production floor.
2025-07-28
14,382 reads
We Gave Memory-Optimized Tables a Hash Lookup — Then Tried Pattern Matching Instead
Introduction It was the week before Black Friday — the biggest online ad rush of the year. Our US-based ad-tech platform was gearing up for an insane traffic spike. Hundreds of real-time campaigns were about to go live across multiple brands, each with thousands of user sessions flowing through our system. Every incoming user impression […]
2025-07-22
2,402 reads
Blogs
Learning from Mistakes: T-SQL Tuesday #194
By Steve Jones
We’re a week late, once again my fault. I was still coming out of...
Stupid Things I Did With AI: ASCII Art
By Steve Jones
I ran across this article recently (https://www.gatesnotes.com/meet-bill/source-code/reader/microsoft-original-source-code) and it has a great opening piece...
Simple Talks Podcasting in 2026
By Steve Jones
I’m in the UK today, having arrived this morning in London. Hopefully, by this...
Forums
Learning From Breakage
Comments posted to this topic are about the item Learning From Breakage
Python in Action to Auto-Generate an Optimized PostgreSQL Index Strategy
Comments posted to this topic are about the item Python in Action to Auto-Generate...
Adding and Dropping Columns I
Comments posted to this topic are about the item Adding and Dropping Columns I
Question of the Day
Adding and Dropping Columns I
I have this table in my SQL Server 2022 database:
CREATE TABLE [dbo].[CityList] ( [CityNameID] [int] NOT NULL IDENTITY(1, 1), [CityName] [varchar] (30) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ) ON [PRIMARY] GOI decide to add two new columns for the StateProvince and Country. What code should I use? See possible answers