Re: date ranges in where

On 2009-05-06, Miguel Miranda <miguel.mirandag@gmail.com> wrote:
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> Hi, what is the recommended way to select a range of dates?

if you want to compare dates, use dates!

> Lets say a have a table with a lastlogin (timestamp) column and i want
> toknow what users logged in for last time between 2009-05-01 and 2009-05-02?
>
> I know that a simple
>
> where lastlogin between '2009-05-01' and '2009-05-02' doesnt work beacuse it
> doesnt include who logged in 2009-05-02 15:30:00, etc...

If you are comparing dates it does.

where lastlogin::date between '2009-05-01'::date and '2009-05-02'::date

If you leave it uncast postgres will probably convert the lastlogin to
a string and produce results other than that desired and proabaly
take longer to do it too.