Click here to monitor SSC
SQLServerCentral is supported by Red Gate Software Ltd.
Log in  ::  Register  ::  Not logged in

More Triggers

By Steve Jones, the old days of T-SQL, back when we wrote "CREATE TRIGGER …. FOR INSERT" we could only have one insert/update/delete trigger for each table. Eventually SQL Server allowed us to have multiple triggers, and even have some control over in what order the triggers fired.

Triggers are often hidden objects that confound DBAs who aren't aware they exist. It's not easy to tell when a table has a trigger on it, and since we don't often use triggers, it's not the first place people look when something strange happens.

However triggers are useful, and it seems that there are many people using them. For this Friday, I wanted to ask how people implement triggers in their applications.


Do you prefer one trigger for each table action or multiple triggers?

I'm curious what's the 80 in your 0/20 rule for triggers. Should all update actions be handled in one trigger? Or should there be one trigger for business logic  and a separate one for auditing? I'm not sure it matters a lot for performance, but I can see that it might be easier to manage and track fewer triggers. The flip side is that something like auditing can be handled with one trigger, and business logic with another: a clean separation.

Triggers aren't usually my first solution to a problem, but I do think there is value in using them. However I don't see a lot of guidance about how to best implement them, so I'm hoping your answers today will help.

Steve Jones

The Voice of the DBA Podcasts

Everyday Jones

The podcast feeds are available at You can also follow Steve Jones on Twitter:

Today's podcast features music by Everyday Jones. No relation, but I stumbled on to them and really like the music. Support this great duo at

I really appreciate and value feedback on the podcasts. Let us know what you like, don't like, or even send in ideas for the show. If you'd like to comment, post something here. The boss will be sure to read it.

Total article views: 794 | Views in the last 30 days: 4
Related Articles

Podcast Announcements

Podcast Feeds


Podcast Problem

Podcast Problem Blocked by group policy



A new video setup is on the way!!!! Actually I'll do a couple podcasts on podcasting over the hol...



I'm working on getting a small studio set up for some podcasting of the editorials. That means I put...


Talking TypeScript on the .NET Rocks! Podcast

I appeared on the .NET Rocks podcast show #1149 this week.  I had a blast talking about TypeScript, ...

database design    
friday poll    

Join the most active online SQL Server Community

SQL knowledge, delivered daily, free:

Email address:  

You make SSC a better place

As a member of SQLServerCentral, you get free access to loads of fresh content: thousands of articles and SQL scripts, a library of free eBooks, a weekly database news roundup, a great Q & A platform… And it’s our huge, buzzing community of SQL Server Professionals that makes it such a success.

Join us!

Steve Jones

Already a member? Jump in:

Email address:   Password:   Remember me: Forgotten your password?
Steve Jones