If I need to combine a bunch of files in a 'union' or 'concat' type fashion I will usually use UNIX tools or perl. Ditto for dropping or re-arranging columns or

If I need to combine a bunch of files in a 'union' or 'concat' type fashion I will usually use UNIX tools or perl. Ditto for dropping or re-arranging columns or filtering out entries. The syntax is usually very terse and for simple tasks isn't too bad in terms of readability/