Selecting the largerst doulbe

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August 10th, 2005, 09:39 PM

Michal Augustyn

Contributing User

Join Date: Dec 2004

Posts: 103

Time spent in forums: 13 h 44 m 16 sec
Reputation Power: 4

Selecting the largerst doulbe

I've got an assignment which wants me to select the alrgest count of a certain entity.

I've got a table of reserve books and I have to select the book that was reserved most. I can easily calculate the total reserves for each book, but how the hell do I select the largest?!

Code:


select 
	call_number, count(call_number) 
from 
	reserve
where
	to_char(reserve_date, 'DD-Mon-YY') like '%Jul%'
group	by
	call_number;

I.e. all I'm interested in are the call_number and their count.
♀Call Number COUNT(CALL_NUMBER)
-------------------- ------------------
AML-3C60 2
AML-3C62 1
AML-3C63 1
AML-3C65 1

is the answer I get.

It's oviousl that the top one's the book with the highest count.
The question is, how do I get just that tuple?

August 15th, 2005, 02:28 PM

shafique

Senior Member

Join Date: Sep 2003

Location: Canada

Posts: 305

Time spent in forums: 2 h 45 m 20 sec
Reputation Power: 6

I am using the same query, find the modification in red color

Code:

select 
	call_number, max(count(call_number) )
from 
	reserve
where
	to_char(reserve_date, 'DD-Mon-YY') like '%Jul%'

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