SQLServerCentral Article

Mini Disaster - AC Failure

Are you prepared to handle a full or partial failure of your AC system? Ever thought about what would happen if it did happen. Once again Andy offers comments on a real world incident. While we'd all like to think it will never happen to us, we think sharing these incidents is a great way to prevent it from happening to others.

SQLServerCentral Article

Making Good Use of Sysforeignkeys Table - Part 1: Display table relati

Sysforeignkeys is a valuable SQL Server resource. How many times have you had to "pick up the pieces" from a database developed by someone else and dropped on your desk? Ever get a database diagram with that? A data dictionary? Probably not too often. Jeffrey Yao has developed a system of finding those parent-child relationships automatically and displaying them so he can get up to speed quickly on these inherited databases. Read on to find out more.

Blogs

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

By

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

Counting Groups with Window Functions: #SQLNewBlogger

By

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

Read the latest Blogs

Forums

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...

System views in a contained availability group

By mark4data

I have a query that runs in a job to check on orphaned users....

Visit the forum

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;

See possible answers