Columns can be referenced in expressions, but only within components in a Data Flow task. This makes sense. Creating a global expression to reference a value in a Data Flow is the equivalent of trying to use a single variable to capture theanbsp;...
|Title||:||Professional Microsoft SQL Server 2014 Integration Services|
|Author||:||Brian Knight, Devin Knight, Jessica M. Moss, Mike Davis, Chris Rock|
|Publisher||:||John Wiley & Sons - 2014-04-17|