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Asked: 2026-06-17T09:31:34+00:00

Possible Duplicate: SQL: find missing IDs in a table getting values which dont exist

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Possible Duplicate:
SQL: find missing IDs in a table
getting values which dont exist in mysql table

Just wondering, is it possible to have a query that somehow tells you the values it did not find in a table?

So if I had a query SELECT * FROM mytable WHERE id IN (1,2,3,4,5,6,7,8,9) and only 2,3,6,7,9 was returned. I wouldd like to know that 1,4,5,8 were not found.

It will be a little hard to do a manual comparision, because this is going to be run over apx 2,000+ rows in a table (the id’s are going to be provided via a csv file which can be copied into the query)

Thanks in advance

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1 Answer

  1. Editorial Team

    This is probably silly, but what about creating a temporary table containing all your IDs from which you’ll substract the result of your SELECT query ?

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