DIfference between max() and greatest() ? - Mailing list pgsql-sql

From Ruben Gouveia
Subject DIfference between max() and greatest() ?
Date
Msg-id 51e507b0809111033j3015b7fcwd1f5922bc66b5ab5@mail.gmail.com
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Responses Re: DIfference between max() and greatest() ?
Re: DIfference between max() and greatest() ?
Pls Hlp: SQL Problem
List pgsql-sql
What is the difference between these two. I know that max() is an aggregate function

select model,count(distinct cars)
from rc_cars
where greatest(baught,returned) < current_date - integer '1'
group by model;

Do i need to have a max () around a greatest() to make sure i get the most recent of the two.

select model,count(distinct cars)
from rc_cars
where max(greatest(baught,returned)) < current_date - integer '1'
group by model;


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