Quote:
Originally Posted by BetterRed
How can I copy one column to another
Specifically I want to copy the standard Calibre column Modified (last_modified) which is a date, to a Custom Column MyModified (mymodified) which is a date.
I want it do it to all books in the library
thanks BR
ps : I have the feeling this is a question to which I once knew the answer 
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did you peek at search and replace in bulk meta-edit?