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Navigating Trees With CTE

Introduction This article shows how common table expressions (CTE) in SQL Server are naturally suited for navigating trees, such as finding its longest path, or diameter. Recall that a tree is an undirected graph where unique paths exist between any two nodes (i.e. vertices). Any node may be selected as its top node, with its […]

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The 2021 State of Database Monitoring survey is now open, and we want to know how you’re currently tackling your server, instance, and database monitoring. By taking part, you’ll contribute to the sole industry-wide report on database monitoring, and provide insights into how SQL Server professionals manage their estates and what challenges they face. Plus, you’ll receive an advanced copy of the report and entry to a prize draw to win a $500 Amazon voucher.

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The Thriving Data Community

A while back I wrote an editorial about how I believed the data community would easily continue after the PASS organization was no more. I'm pleased as punch to be able to report that I was right. Not because I enjoy being right (I do, who doesn't), but because I care very much for the […]

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Things We Are Missing

I read this great little blog post called "Trying to Notice What's Missing." It's not real long and it's worth your time. If you'd like a TLDR, the author points out how in-person meetings at conferences resulted in enhancements to open source software due to superior, in-person, communication. Strictly on a personal level, I miss […]

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An Unusual Identity

By Steve Jones - SSC Editor

Comments posted to this topic are about the item An Unusual Identity

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Question of the Day

An Unusual Identity

What values are returned when I run this code?

CREATE TABLE dbo.IdentityTest2
(
     id NUMERIC(10,0) IDENTITY(10,10) PRIMARY KEY,
     somevalue VARCHAR(20)
)
GO
INSERT dbo.IdentityTest2
(
    somevalue
)
VALUES
( 'Steve')
, ('Bill')
GO
SELECT top 10
 id
 FROM dbo.IdentityTest2

See possible answers