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".

(63)

You rated this post out of 5. Change rating

2014-09-19 (first published: )

42,760 reads

Blogs

Flyway Tips: AI Deployment Script Descriptions

By

With the AI push being everywhere, Redgate is no exception. We’ve been getting requests,...

A New Word: Fawtle

By

fawtle – n. a weird little flaw built into your partner that somehow only...

Post-quantum key exchange – Insurance policy for your packets

By

AWS recently added support for Post-Quantum Key Exchange for TLS in Application Load Balancer...

Read the latest Blogs

Forums

Where Your Value Separates You from Others

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Where Your Value Separates You...

Fixing the Error

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Fixing the Error

T-SQL in SQL Server 2025: Encoding Functions

By Steve Jones - SSC Editor

Comments posted to this topic are about the item T-SQL in SQL Server 2025:...

Visit the forum

Question of the Day

Fixing the Error

On SQL Server 2025, I have a database that has this collation: SQL_Latin1_General_CP1_CI_AS. I decide I want to run this code:

SELECT UNISTR('*3041*308A*304C*3068 and good night', '*') AS 'A Classic';
I get this error:Msg 9844, Level 16, State 4, Line 24 The char/varchar input type uses an unsupported collation. Only a UTF8 collation is supported with char/varchar input type in UNISTR function.What is the easiest way to fix this error?

See possible answers