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Compare 2 List Of User Ids From Different Tables

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Hi all. I am trying to make a list out of 2 list. The first list is a complete list of users id from users table (List A) The Second list is of users id from another table (List :PI want to subtrack the user ids in List B from List A and make List C.Thanks in advance for any help :)Update: I looked up a old sql book i had and found some query examples. I tried the EXCEPT statement in mysql but it dont work so used another example.

SELECT userid, usernameFROM usersWHERE userid NOT IN (SELECT ea_user_idFROM events_attend)

Good thing Mysql can do it I was dreading the idea of having to do this in php arrays.

Edited by sonesay (see edit history)

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