MySQL日期间隔选择

Question

i've made this SQL code :

CREATE TABLE `logs` (
    `id_log` INT(11) NOT NULL AUTO_INCREMENT,
    `data_log` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
    PRIMARY KEY (`id_log`),
)

i made it to Insert a record when my server goes down,but i would like to make some check if it wasn't Inserted the same record 10 minutes before.

So i was looking for some SELECT that shows only records from NOW() to 10 minutes before.

Answer 1

这将返回最近十分钟写入日志的记录数：

SELECT Count(*) as count_in_last_10 FROM logs WHERE data_log BETWEEN DATE(NOW()-INTERVAL 10 MINUTE) AND NOW()

Answer 2

You're looking for INTERVAL # [UNIT] , there's various ways to use it -- http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html :

SELECT count(*)
  FROM logs
 WHERE data_log > NOW() - INTERVAL 10 MINUTE;