Articles

SQLServerCentral Article

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

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".

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2014-09-19 (first published: )

43,660 reads

External Article

A TDD Journey: 3- Mocks vs. Stubs; Test Frameworks; Assertions; ReSharper Accelerators

Test-Driven Development (TDD) involves the repetition of a very short development cycle that begins with an initially-failing test that defines the required functionality, and ends with producing the minimum amount of code to pass that test, and finally refactoring the new code. Michael Sorens continues his introduction to TDD by implementing the first tests and introducing the topics of Test doubles; Test Runners, Constraints and Assertions.

2014-09-19

7,785 reads

External Article

Survey: Using Online Accounts

Using online accounts for license management has some advantages, Red Gate is researching how to implement this for our tools in a way that improves the experience for all involved. To say thank you for your participation, there's a chance to win a $25 Amazon certificate.

2014-09-15

7,444 reads

External Article

Who Broke the Build?

Continuous Integration and automatic builds are fantastic tools for software teams, but only if developers take responsibility for their code. Karsten Kempe explains how to use Team Foundation Server to drive better continuous integration, and walks through a simple open-source tool he built to make nightly builds more transparent, and more valuable.

2014-09-15

7,853 reads

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Question of the Day

RegEx Functions IV

I have this data in a table in a SQL Server 2025 database:

EmailAddressID EmailAddress
7              dylan0@ADVENTURE-WORKS.COM
8              Diane1@ADVENTURE-WORKS.COM
If I run this query, which row(s) are returned?
SELECT top 10
 *
 FROM person.EmailAddress
 WHERE REGEXP_LIKE(EmailAddress, '^D', 'i')
 AND BusinessEntityID IN (7,8)

See possible answers