Question

I’m using Postgres’ native array type, and trying to find the records where the ID is not in the array recipient IDs.

I can find where they are IN:

SELECT COUNT(*) FROM messages WHERE (3 = ANY (recipient_ids))

But this doesn’t work:

SELECT COUNT(*) FROM messages WHERE (3 != ANY (recipient_ids))
SELECT COUNT(*) FROM messages WHERE (3  = NOT ANY (recipient_ids))

What’s the right way to test for this condition?

Answer 1

SELECT COUNT(*) FROM "messages" WHERE NOT (3 = ANY (recipient_ids))

You can always negate WHERE (condition) with WHERE NOT (condition)