Hello,
You can assign the value to a variable by
1. Selecting the property of the variable and then specifying the expression, remember to set the value EvaluateAsExpression to True
2. Using a script task to assign the values
3. Using Execute SQL task, Set ResultSet to SingleRow and the Pass the Result Set value to the variable you want to store the value. As in your example, variables @[User::Root_Folder], @[User::Tbl_Name] and @[User::File_Name] will be parameters to the
following SQL statement "Select ? + ? + ?" As Full_Path