2025-05-16
608 reads
SQL Server internal storage
2025-01-15
1,852 reads
What happens when we drop a column on a SQL Server table? Where's my space?
You have dropped a column and wondering why you haven't recovered any space? Let's take a look.
2024-08-01 (first published: 2024-04-26)
4,429 reads
Identify Tables With Dropped Columns
How easily can we find tables with dropped columns that need cleanup?
2024-06-07
2,346 reads
2024-04-10
442 reads
Understanding CRUD Operations on Tables with B-tree Indexes, Page-splits, and Fragmentation
Introduction Every DML transaction reads the data before it makes any changes. Not only during a SELECT query, but when you run any DML statement, insert, update, or delete, SQL Server first fetches a bunch of pages into the buffer pool locating the desired rows and changes them while synchronously writing to the transaction log […]
2021-05-10
7,824 reads
Understanding CRUD Operations Against Heaps and Forwarding Pointers
In this article, we examine how data changes are made against heaps.
2021-05-03
4,701 reads
Understanding the Internals of a Data Page
In Part 1 of this series, we examine the structure of data pages and how your tables are stored on these pages.
2021-04-13
18,656 reads
2020-06-26
639 reads
Transaction Log Structure
Intro This post shows the internal logical structure of the SQL Server Transaction Log. The details here target SQL Server 2000 to 2017. Note that SQL Server 2019 will...
2019-04-12
Blogs
Modify Power BI page visibility and active status with Semantic Link Labs
Setting page visibility and the active page are often overlooked last steps when publishing...
T-SQL Tuesday #190–Mastering a New Technical Skill
By Steve Jones
It’s time for T-SQL Tuesday again and this time Todd Kleinhans has a great...
Getting Started with the MSSQL AI Agent in VS Code
By Steve Jones
Recently I was working in VS Code and I saw a walkthrough for the...
Forums
Laptop on Rent in Bangalore – Flexible & Affordable Solutions
Looking for a laptop on rent in Bangalore? Renting laptops is a smart choice...
Password Guidance
Comments posted to this topic are about the item Password Guidance
Using table variables in T-SQL
Comments posted to this topic are about the item Using table variables in T-SQL
Question of the Day
Using table variables in T-SQL
What happens if you run the following code in SQL Server 2022+?
declare @t1 table (id int); insert into @t1 (id) values (NULL), (1), (2), (3); select count(*) from @t1 where @t1.id is distinct from NULL;See possible answers