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SQLServerCentral Article

Dealing With Changing Data

As Chris points out, in most applications these days you end up having to go with optimistic locking, which presents a few challenges. Chris works through the list of options. If you're building web/disconnected apps and need anything besides last update wins, this one is for you.

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2003-12-19

9,474 reads

Technical Article

Superior SQL Builder v1.3 released

Red Earth Technologies announces the release of version 1.3 of Superior SQL Builder, its SQL tool that allows users to visually build complete SQL scripts without typing any code.

Superior SQL Builder introduces new SQL scripting technology, allowing users to quickly and easily transform their database data. In version 1.3 this scripting technology has been extended and enhanced so that complex SQL scripts can be built in less time and with greater ease.

2003-12-11

327 reads

SQLServerCentral Article

Codd's Rules

Frank gives us his take on Codd's Rules. If you're new to databases, this is the core theory that resulted in the development of RDBMS. If you're more experienced with databases, maybe now is a good time to return to the rules to see how you're doing!

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2003-12-10

20,381 reads

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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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