Hierarchy

SQLServerCentral Article

Hierarchies on Steroids #1: Convert an Adjacency List to Nested Sets

  • Article

SQL Server MVP Jeff Moden shows us a new very high performance method to convert an "Adjacency List" to “Nested Sets” on a million node hierarchy in less than a minute and 100,000 nodes in just seconds. Not surprisingly, the "steroids" come in a bottle labeled "Tally Table".

4.9 (63)

You rated this post out of 5. Change rating

2014-09-19 (first published: )

38,652 reads

Blogs

Migrate datetime data to datetimeoffset with AT TIME ZONE

By

I recently reviewed, worked on, and added a similar example to the DATETIMEOFFSET Microsoft...

The Comprehensive Guide to Mastering Your SQL DBA Skills

By

Database administrators (DBAs) are the backbone of data-driven organizations. If you're looking to break...

Friday Basics: Authentication vs. Authorization

By

Another security fundamentals topic is authentication versus authorization. For those who have a clear...

Read the latest Blogs

Forums

The OS returned the error '(null)' while attempting 'DeleteFile' filestream.hdr

By lmarkum

I have a SQL Server 2019 Enterprise Edition on CU 25. It has in-memory...

Take Care

By Grant Fritchey

Comments posted to this topic are about the item Take Care

Performance

By LearningDBA

Experts, I am learning some skills so I can troubleshoot some performance-related issues. I...

Visit the forum

Question of the Day

Two Table Hints

What happens when I run this code:

SELECT
  p.ProductName
, p.ProductCategory
FROM dbo.Product AS p WITH (NOLOCK, TABLOCK);

See possible answers