MySQL - Select all UNLESS query
===

I have a query that I use the works, but now I need to modify it so that it excludes rows if they have a certain data in a field.

Here's the current code:

    SELECT oc_ieentry,oc_sysitem,oc_item,oc_itemdesc,oc_purchasedate,oc_url FROM catalog WHERE oc_purchasedate >= date_sub(current_date, interval 21 day) ORDER BY oc_item ASC


What I need to do is add a statement in there that if oc_ieentry LIKE 1, then those rows should not be shown. 