Quote:
Originally Posted by kiwidude
As of today in Calibre you are correct, there is no built-in functionality to help you identify the duplicates that you have already imported into your library.
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In the meantime, your options are to (a) be patient  until we get the development done, (b) manual inspection which I agree isn't practical for a large library, or (c) use tools/scripts outside of Calibre to query against the database, some of which you will find in old threads on these forums if you search. |
The one option that currently does exist for global duplicate finding is to use Copy to Library with Automerge turned on to export your entire library to another library. Durning that proces, automerge will try to put identical formats into a single book record. It's going to give results similar to what would have happened if that option had been turned on from the beginning of importing. It's mainly useful where you had good author/title data, but had automerge off and accepted lots of duplicate records, one for each format.
It's far from perfect, and you might even lose some metadata where some records have good data and other matching records have bad data. It depends on the order of processing. You keep metadata only from the first record processed. The formats for matching records are added to that first record, but no metadata is added.
If you've got garbage for author/title, it won't do much good.