query help

Hello,

I'm not sure if this can be done using a sql, but I'm trying to select the userids of the rows that doesn't have a certain value, in this example, I want to select the userid who didn't order any pencils, so if they had ordered something else and some pencils, I do not want these rows.
so in this example, I would like to select only userid 2 (and only one row is desired to be returned); is this possible with sql?
thank you in advance!

userid item price
-------- ----------- ------
1 pen .25
1 pencil .15
1 eraser .50
2 pen .25
2 eraser .50
3 pen .25
3 pencil .15
3 eraser .50

you can also write the following query:

SELECT DISTINCT userid from table1
WHERE item_name NOT IN ('pencil','eraser','pen')
/

thanks very much guys.
I like hedge's solution better simply because I don't know what other kinds of items a customer could potentially buy. I did however added in the "distinct" clause.
thanks again guys!!!!
this forum is wonderful!

- Sammy