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I'm a SaaS application developer who likes to learn about SQL and how to make it run well.

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Extending a SQL Server Failover Cluster Across Regions in  Google Cloud Platform (GCP)

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The Cloud Security Problem

By Steve Jones - SSC Editor

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Virtualizing AWS data by using Fabric Shortcuts: Data Engineering with Fabric

By John Miner

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Timescale Brings PostgreSQL into the GenAI Era with pgai Vectorizer

By Steve Jones - SSC Editor

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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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