MySQL select records 1 hour ago or fresher on datetime column

What where clause can I use to select records that are one hour ago or fresher using a DATETIME time开发者_运维百科stamp?

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Something like this? I assume an DATETIME timestamp is an DATETIME field.

SELECT * FROM table WHERE datetimefield >= DATE_SUB(NOW(), INTERVAL 1 HOUR)

For more information check MySQL's date/time functions.