Technical Article

Update multiple rows (in a set) using a single SP

Here is another variation of processing multiple records with a single procedure call but allowing for set processing.The helper functions make use of the sequencetable pattern. These helper functions can be used to parse strings into records, so one gets a list, or simply return the nth field.There are two functions that will parse into […]

You rated this post out of 5. Change rating

2004-12-17 (first published: )

773 reads

Blogs

Counting Groups with Window Functions: #SQLNewBlogger

By

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

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

By

I was the principal author of this SIOS whitepaper, which describes how to build...

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