I need help with I think should be a pretty simple query.

[Gmunky]

How do i write a query that outputs all the records when a specified attribute is null?
for instance, if the table looks like this:
_______________________
studentID | phone            |
--------------------------|
1          |111-111-1111  |     
2          |222-222-2222  |
3          |                      |
4          |                      |
---------------------------

I want to output all the studentIDs with no phone numbers.

i tried SELECT studentID WHERE phone is NULL; but i get an empty set.
Thanks for all your help!

[.josh]

how about:

select studentID from table where phone = ''

[Gmunky]

ha. thanks!

[Gmunky]

ok. how about if I want to output the studentID's that are NOT null?

[obsidian]

[code]
SELECT * FROM tableName WHERE studentID IS NULL;
[/code]

[.josh]

[quote author=Gmunky link=topic=107792.msg432824#msg432824 date=1158076787]
ok. how about if I want to output the studentID's that are NOT null?
[/quote]
select studentID from table where studentID != ''