Question: I'm trying to return duplicate records in a user table where the fields only partially match, and the matching field contents are arbitrary. I'm not sure if I'm explaining it well, so here is the query I might run to get the duplicate members by some unique field:

```
SELECT MAX(id)
FROM members
WHERE 1
GROUP BY some_unique_field
HAVING COUNT(some_unique_field) > 1

```

I want to apply this same idea to an email field, but unfortunately our email field can contain multiple e-mails seperated by a comma. For example, I want a member with his email set to "user@someaddress.com" to be returned as a duplicate of another member that has "user@someaddress.com","someotheruser@someaddress.com" in their field. `GROUP BY` obviously will not accomplish this as-is.

Answer: 
IBOutlet doesn't do anything in the resulting code — it's literally erased by the preprocessor. It's just there so Interface Builder can scan your header to see which things it should treat as outlets.
AFAIK, it doesn't matter if you put the IBOutlet on the ivar or the property. Either way, in general, IBOutlet properties should be (nonatomic, assign), and not retained, as the NIB loader handles all of that.