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Technical Article

How to shrink tempdb database in SQL Server

This article discusses different methods that you can use to shrink the tempdb database in Microsoft SQL Server. Before you shrink the tempdb database using the methods described in this article, note the following: The tempdb size is reset to the final configured size (i.e. to the default size or the final size that was […]

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2021-06-09

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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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