mysql select where where datetime is within this hour

Question

Hi I am trying to select row's where the datefiled eg 11-11-2011 12:00 is equal to the current hour.

Sorry, to add it should match the whole date but round to the hour.

Here's what I have so far :

SELECT * FROM emails WHERE SUBSTRING(datetosend,0,12) = SUBSTRING(NOW(),0,12)

Answer 1

SELECT *
FROM emails
WHERE DATE_FORMAT(datetosend, '%Y-%m-%d %H') = DATE_FORMAT(NOW(), '%Y-%m-%d %H');

This sql doesn't care which date format your column is using.

Answer 2

Try this:-

SELECT *
FROM emails
WHERE HOUR(datetosend) = HOUR(NOW());

Answer 3

尝试这个：

SELECT * FROM x where SUBSTRING(d,0,12)=  SUBSTRING(date_format(NOW(), '%d-%m-%Y %I' ),0,12 )