小编Col*_*bet的帖子

我花了很长时间来学习如何在 MySQL 中处理时间戳，我认为我实现了我的目标，但我想仔细检查两件事：

1）这些是否符合我的预期

2）这些查询/功能是否有更快的替代品

今天

SELECT COUNT(*) AS count FROM log WHERE DATE(datet) = DATE(NOW())

本星期

SELECT COUNT(*) AS count FROM log WHERE YEARWEEK(NOW()) = YEARWEEK(datet)

上个星期

SELECT COUNT(*) AS count FROM log WHERE YEARWEEK(datet) = YEARWEEK(DATE_SUB(NOW(), INTERVAL 1 WEEK))

这个月

SELECT COUNT(*) AS count FROM log WHERE datet > DATE_SUB(NOW(), INTERVAL 1 MONTH)

上个月

SELECT COUNT(*) AS count FROM log WHERE datet > DATE_SUB(NOW(), INTERVAL 2 MONTH) AND datet < DATE_SUB(NOW(), INTERVAL 1 MONTH)