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mysql query all entries which 'dont' match

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# 1  
Old 04-06-2009
mysql query all entries which 'dont' match
I am trying to query a list of hosts and extract all entries which 'dont' match.

Code:
SELECT LOGS.host, GOODLIST.host FROM LOGS,db.GOODLIST WHERE (LOGS.host <> GOODLIST.host)

When I use this query, it is very very slow. Matching the host with the GOODLIST.host works great and fast but when I use <> to get the hosts which DONT match, it doesnt work as expected. Am I using the wrong approach?

thanks & regards
# 2  
Old 04-08-2009
you can try
Code:
SELECT LOGS.host, GOODLIST.host FROM LOGS,db.GOODLIST WHERE GOODLIST.host NOT IN (SELECT LOGS.host from LOGS);

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