SSIS - Expression Task

In this tutorial, we are going to learn how does Expression Task work in SSIS package. The SSIS Expression task will allow you to set variable values at runtime without the need for a script task. This was a new feature when SSIS 2012 rolled out a few years ago. It’s a pretty easy task to use and also helps you avoid having to write any .net code as well. The expression language includes functions and operators.

Things to be Noted: 

• You can only set 1 variable at a time with this task. If you need to do more you can add additional expression tasks or use one script task to set all of them at once.
• You must have SSIS 2012 or higher. If you have SSIS 2008R2 and below you can still use this functionality but it’s slightly more complicated because you will have to create a script task to do this for you.

One common usage for the expression task in SSIS is to implement conditional flow of the constraints. In the below screenshot you can see that we implement an expression tasks which follows an error checking activity and evaluates if there were any errors , if yes the execution move to the right else to the left.

To watch the live demo, please visit my YouTube Channel -