我有一个mysql数据库,如下所示:Timestamp是一种datetime数据类型,我需要获取按月、日和小时分组的数据。我使用mysql和php编写脚本。通过以下查询,我可以按月和按天完成此操作:
$query = "SELECT COUNT(id) as totals FROM security_transactions WHERE YEAR(timestamp) = 2012 GROUP BY MONTH(times
我有以下MySQL5.5查询:但也想按每天分组(如2014-06-23),这样我就可以看到哪一天的page_views每url最多。created_at from page_views group by original_url, created_at order by count(original_url) d