[UPHPU] Deduping a list

[Ash]

Wade Preston Shearer wrote:

>> I have a list of email addresses and a list of those who have  
>> unsubscribed. (We get a new list to send to every time from our  
>> partner, but we have to keep track of those who have unsubscribed  
>> from getting our emails, and remove them from the new list every  time.)
>>
>> So I have list 1 that has 10,000 email addresses in it and a list  of 
>> unsubscribes that has about 200 email addresses. I want to  remove 
>> all unsubscribes from the main list. Is there an easy way to  do it?
>
>
> Where/how are these lists kept?

One list is a .csv file and the other is in mysql. I have access to the 
server with mysql on it so I can import both there and do it there if 
it's  the best place.

Ash