Variables in the Azure Data Factory pipeline provide the functionality to hold the values. They are used for a similar reason as we use variables in any programming language and are available inside the pipeline.
Set variables and append variables are two activities used for setting or manipulating the values of the variables. There are two types of variables in a data factory: -
i) System variables: These are fixed variables from the Azure pipeline. For example, pipeline name, pipeline id, trigger name, etc. You need these to get the system information required in your use case.
ii) User variable: A user variable is declared manually in your code based on your pipeline logic.
