How to get First X rows

I need to select only the first X (say 10) rows of an ordered result. Because the result set may be millions of rows, I do not like the idea of producing the entire result, including having it ordered, and then only iterating over the first few.
How can I get oracle to only return the first 10 rows?
Ex.
select
calls.ph_number
calls.call_length
call_types.call_desc
from
calls,
call_types
where
calls.cust_num = SOME_CUST_NUM
calls.type = call_type.type
order by
calls.call_length

Since it is answered incorrectly or incompletely so frequently, I would suggest that you read Tom Kyte's article on the subject http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:127412348064
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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How to retrive first n rows

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Since this forum does not currently have an assigned Oracle moderator, in order to provide quick, thorough responses, and help eliminate duplicate posts, a few of us "Rogue Moderators" have recently begun a home page for providing links to other pages which contain thorough answers to Frequently Asked Questions (FAQ), like the one you are asking, including references to on-line documentation and other sources. The following link will take you to that page:
Re: How to attach a java bean in forms6i
From the FAQ home page, if you scroll down, you will see a topic that I have just added, which should provide a thorough response to your question:
HOW TO: Get first n, last n, or rows m thru n, top-n analysis, ROWNUM pseudocolumn
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Regards,
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Message was edited by: Nibu Wilson

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Edited by: prakashdba on Apr 7, 2009 3:09 AM

Then how about this
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Hi Frank,
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--Prasanna

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Hi,
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How to get First X rows

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