SELECT all records that are 30 days old

Question

I need to SELECT all records that are 30 days old. I have the code below but it\'s not working. In updatestatus I have dates like 12/26/2011. I create a 30 day old date like

Answer 1

If the datatype of updatestatus is date:

SELECT * 
FROM people 
WHERE updatestatus <= '2012-01-01'

or:

SELECT * 
FROM people 
WHERE updatestatus <= CURRENT_DATE() - INTERVAL 1 MONTH

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If the datatype is datetime or timestamp and you want to check the time part, too:

SELECT * 
FROM people 
WHERE updatestatus <= NOW() - INTERVAL 1 MONTH

You can put an exact datetime instead of the NOW() - INTERVAL 1 MONTH. The correct way depends on how you are storing the datetimes or timestamps (does the Perl code or MySQL creates them in the first place?).

You could also put - INTERVAL 30 DAY which yield slightly different results.

Answer 2

If the time column is in timestamp then use below query.(use from_unixtime function)

SELECT wd.* FROM `watchdog` as wd
WHERE  from_unixtime(wd.timestamp) <= NOW() - INTERVAL 1 MONTH

Answer 3

You can try this way. In SQL, there is dateadd function and I think there should be similar function in MySQL.

select *
from Table
where str_to_date between dateadd(day,-30,getdate()) and getdate()

It retrieve records between current date and past 30 days. You need to adjust for time. If you don't count time, you need to remove timestamp.

Answer 4

This is what I used. Very simple

$sth = $dbh->prepare(qq(SELECT * FROM people WHERE updatestatus + INTERVAL 30 DAY <=     NOW() )) or die $DBI::errstr;