Welcome to Mobileread.
I see garcle has explained how this feature exists in calibre and has for quite a while.
If you had gone to the change log
titled What's New you might have found the following:
Release: 0.6.25 [30 Nov, 2009]
- Add option to swap title and author in the Bulk metadata dialog Closes tickets: 3885
is also a good source
It seems to me that this must be open old obsolete thread day. There is a reason you were presented with and Old Thread Warning
when posting to this thread.
Please, in the future, if possible avoid reopening dead obsolete threads. There is no harm in asking a question in a new thread (see attached), but don't clutter the thread with obsolete junk.