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Catch-up on Redgate Summit

Did you miss the excellent presentations from DevOps experts Pramod Sadalage, Kellyn Pot’Vin Gorman, Samir Behara, and Kendra Little? Good news – all Redgate Summit sessions are available on-demand now. Choose from ‘the future of database DevOps’ keynote, latest DevOps trends, Q&A discussion, and demos.

2021-03-05

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SQL Server 101 Tutorial

Since its initial release in 1989, SQL Server has come a long way from its base functionality as an enterprise level database platform. While the core of SQL Server is still it's database engine, it is now so much more than just a relational database plat

2021-03-04

Blogs

Free webinar – Tackling the Gaps and Islands Problem with T-SQL Window Functions

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I’m hosting a free webinar at MSSQLTips.com at the 19th of December 2024, 6PM...

Counting Groups with Window Functions: #SQLNewBlogger

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I looked at row_number() in a previous post. Now I want to build on...

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Visual Studio 22 / SSIS Project / (Project) Connection problem

By WilburSmith

Hello, First of all, I find it odd/annoying that I can't exclude a Project...

How to determine if a DB is currently being used

By dax.latchford

Hi - I'm looking for advice regarding the best & quickest way to establish...

Data cleansing/conversion tool HPE

By juliava

Hello.   I am looking for a tool Data cleansing/conversion, was recommended HPE any...

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Question of the Day

The LAGging NULL

I have this data in a SQL Server 2022 table:

player         yearid team HR
Alex Rodriguez 2012   NYY  18
Alex Rodriguez 2013   NYY  7
Alex Rodriguez 2014   NYY  NULL
Alex Rodriguez 2015   NYY  12
Alex Rodriguez 2016   NYY  9
If I run this code, what are the results returned in the hrgrowth column?
SELECT
  player
, yearid
, hr
, hr - LAG (hr, 1, 0) IGNORE NULLS OVER (ORDER BY yearid) AS hrgrowth
FROM dbo.playerstats;

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