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Dec 7, 2020 at 19:20 comment added Alex A. Yeah, these are not assumptions, I tested and retested these things.
Dec 7, 2020 at 17:10 comment added Erwin Brandstetter If so, you can as well test with this simpler query: SELECT * FROM listing_master m WHERE NOT EXISTS (SELECT FROM listing WHERE feed_listing_id = m.feed_listing_id) Still missing rows? But are you sure your assumptions are true? Test, rather than just assume. Like Sherlock Holmes said: "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."
Dec 7, 2020 at 8:06 comment added Alex A. For the last couple of days I am trying to make sense of your answer, and I am not sure I get it. Some things to clarify though: Currently, there is only one feed_id in the system. #2. Since the data is initially coming from an external feed, it is impossible to have duplicate feed_listing_id if it was already deleted.
Dec 6, 2020 at 0:05 history answered Erwin Brandstetter CC BY-SA 4.0