Fetching rows added last hour
I keep a record of logins in a table. I have columns for id, ip, date and time. From that record of logins I wanna fetch logins made only in the last hour.
I'm sweeping through the MySQL docs on time and date functions, but I just can't seem to combine them correctly.
Can somebody help me?
Make use of the DATE_SUB() and Now() functions:
select count(*) as cnt
from log
where date >= DATE_SUB(NOW(),INTERVAL 1 HOUR);
Hope it helps you : )
If you want to implement this into a cronjob, you need to specify the start and end.
For example, at 2pm, if you want to get the data for the past hour from 13:00:00 until 13:59:59, here's how to do it:
dateField BETWEEN
DATE_FORMAT(DATE_SUB(NOW(), INTERVAL 1 HOUR), '%Y-%m-%d %H:00:00')
AND
DATE_FORMAT(DATE_SUB(NOW(), INTERVAL 1 HOUR), '%Y-%m-%d %H:59:59')
it can be done easily using
select count(*) from logins where datetime>= NOW()- INTERVAL 1 HOUR
I recommend have one datetime column instead of date and time columns.
Suppose you have a datetime column called last_login:
SELECT id, ip_address, last_login
FROM mytable
WHERE last_login >= DATE_SUB(NOW(), interval 1 hour);
You can also use CURDATE()function
SELECT
count(*) AS TotalCount
FROM
tblName
WHERE
datetime >= DATE_SUB(CURDATE(), INTERVAL 1 HOUR)