Combinations, permutations, and derangements
Joe Celko explains how several mathematical concepts, combinations, permutations, and derangements, relate to databases.
2022-06-01
Additional Articles
Managing Database Code Quality in a Flyway Development
In this article, I'll discuss the most important quality metrics for a database development, and then practical ways to ensure that a Flyway-managed database is designed and implemented to a high enough standard that it is reliable to use.
2022-06-01
Getting Started with Flyway and any RDBMS
How to get started with Flyway, as simply as possible, using PowerShell. This article provides a practice set of Flyway migration scripts that will build the original pubs database on either SQL Server, PostgreSQL, MySQL, MariaDB or SQLite and then migrate it from version to version, making a series of improvements to its schema design.
2022-05-30
Search all String Columns in all SQL Server Tables or Views
In this article we look at T-SQL script you can use to search for a string in every table and view in every database or in a specific database.
2022-05-30
Memory profiling in Python with tracemalloc
You can find memory leaks in Python code with tracemalloc. In this article, Priyanka Nawalramka demonstrates how to use tracemalloc to find the leaks.
2022-05-27
Simple Reporting with Flyway and Database Models
If you can generate a file-based (JSON) model for each new version of a database, produced by a Flyway migration, then you have an easy way to run simple reports to help you search, list, and understand the structure of these databases. I'll show how to produce the models using PowerShell and then run some queries against them to generate the reports.
2022-05-27
Oracle optimizer removing or coalescing subqueries
The Oracle optimizer often changes the query to get better performance. In this article, Jonathan Lewis explains two more optimizations involving subqueries.
2022-05-25
Sharing SQL Prompt Code Snippets and Styles via the Redgate Platform
SQL Prompt users can now share formatting style or code snippets in designated Team spaces on the Redgate Platform. Louis Davidson explains how it works.
2022-05-25
Database DevOps: Standardize, Automate, Monitor & Protect
See how our end-to-end framework for extending DevOps to your database enables your organization to balance the demand to deliver software fast with the need to protect and preserve business critical data.
2022-05-23
Getting results using less T-SQL
There is usually more than one way to write a query. In this article, Edward Pollack explains a few ways to write simpler T-SQL code.
2022-05-23
Blogs
The Book of Redgate: Spread across the world
By Steve Jones
This was Redgate in 2010, spread across the globe. First the EU/US Here’s Asia...
Merry Christmas
By John
Today is Christmas and while I do not expect anybody to actual be reading...
Self-Hosting a Photo Server the Whole Family Can Use
By Bert Wagner
Until recently, my family's 90,000+ photos have been hidden away in the depths of...
Forums
Happy Holidays, Let's Do Nerdy Stuff
Comments posted to this topic are about the item Happy Holidays, Let's Do Nerdy...
UNISTR Escape
Comments posted to this topic are about the item UNISTR Escape
Celebrating Tomorrow
Comments posted to this topic are about the item Celebrating Tomorrow
Question of the Day
UNISTR Escape
In SQL Server 2025, I run this command:
SELECT UNISTR('*3041*308A*304C\3068 and good night', '*') as "A Classic";
What is returned? (assume the database has an appropriate collation)
A: 
B: 
C: 
See possible answers