Thank you both for responding. Chaley, I always restarted Calibre and I have no data in the column because the data I want to take is assigned to the program when a book is modified.
Theducks, I'm not sure understand you. Is possible that in a custom column can choose or use the last_modified information? Because this is the value I need, or maybe, a way to copy the last_modified info to another column and then I use this info.
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