Question

EDIT: What I need to show are those emails from the list in the SQL query that DO NOT appear in tresp.

I have the following code:

SELECT * FROM tresp WHERE email IN ('[email addy here]','[email addy here]','
[email addy here]','[email addy here]','[email addy here]')

This may sound odd but want I want to do is actually show the email addresses that are NOT in the tresp – is that possible?

Cheers,

H.

Answer 1

Tricky question, this solution isn’t very elegant but it works;

SELECT * FROM (
  SELECT 'email1' AS email UNION 
  SELECT 'email2'          UNION 
  SELECT 'email3'          UNION 
  SELECT 'email4'          UNION 
  SELECT 'email5' 
) AS a WHERE a.email NOT IN (SELECT email FROM tresp);

If you run into the same charset problems I had, create the table with default charset utf-8.

Edit: Added an AS since older MySQL seems to have trouble without it.

Demo at SQLFiddle.