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Old 12-08-2021, 11:24 AM   #2
theducks
Well trained by Cats
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Posts: 31,099
Karma: 60358908
Join Date: Aug 2009
Location: The Central Coast of California
Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A
Rather than bloat the DB (or process) by adding a calculated column:

A search
identifiers:false will show books that Calibre ha NO identifier entries

Use the Tag Browser Expand Identifiers:
click once (green) to Show WITH, twice (Red) missing that type. Holding the control key allow building combinations
AND you can Save that search Click Saved Search at the far right:add
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