Q:

Is there a way around for SSIS data migration

Im totally unfamiliar with SSIS migration. So I appreciate the help. 
I am doing the derivation for one column from source to destination. 
the problem is:
Existing column: nVarchar(30)
Destination column: nVarchar(12)
How do I migrate the data or is there a way to write expression on derived column? 
Also I m doing the same thing for another column: 
Derive from Feature, if not NULL then set to TRUE
How do I write expression on derived column?
Thanks

A:

To change data type from nvarchar(30) to nvarchar(12) you can use "Data conversion" component.

To replace NULL's with other values you can use "Derived column" with expression like this:

ISNULL(YourColumn) ? TRUE : YourColumn

Here is an example for nvarchar column:

