DIfference between max() and greatest() ?

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От Ruben Gouveia
Тема DIfference between max() and greatest() ?
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Msg-id 51e507b0809111033j3015b7fcwd1f5922bc66b5ab5@mail.gmail.com
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Ответы Re: DIfference between max() and greatest() ?  ("Bart Degryse" <Bart.Degryse@indicator.be>)
Re: DIfference between max() and greatest() ?  (Peter Eisentraut <peter_e@gmx.net>)
Pls Hlp: SQL Problem  (Hengky Lie <hengkyliwandouw@gmail.com>)
Список pgsql-sql
<div dir="ltr">What is the difference between these two. I know that max() is an aggregate function<br /><br />select
model,count(distinctcars)<br />from rc_cars<br />where greatest(baught,returned) < current_date - integer '1'<br />
groupby model;<br /><br />Do i need to have a max () around a greatest() to make sure i get the most recent of the
two.<br/><br />select model,count(distinct cars)<br /> from rc_cars<br /> where max(greatest(baught,returned)) <
current_date- integer '1'<br /> group by model;<br /><br /><br /></div> 

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