I have two tables emails and blockedSender I am trying to remove blocked sender from the email query. e.g.
emails table:
user_id | from_address |
---|---|
1 | name-1 <email-1@address.com> |
2 | name-2 <email-2@address.com> |
blockedSender table:
blocked_address |
---|
email-1@address.com |
Here I want to return all elements from the emails table where the from_address does not do a LIKE match with entries in the blocked address. Something similar to
select email_id, from_address from emails e where from_address not like in (select '%' + blocked_address + '%' from blockSenders)
which does not work because of incorrect syntax. Is there any way to do this?
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Answer
You can express this using not exists
select e.email_id, e.from_address from emails e where not exists ( select * from blockedSenders b where e.from_address like '%' + b.blocked_address + '%' )