mysql – 选择每秒最大计数

我有一张这样的桌子

CREATE TABLE news
(
Id         INT NOT NULL auto_increment,Headline   VARCHAR (255) NULL,InDateTime   DATETIME NULL
)

如何获取每秒记录数(InDateTime)？

我正在使用MysqL

样本记录：

578921,'headline1','8/20/2012 12:01:53 PM' 
578922,'headline2','8/20/2012 12:01:53 PM' 
578923,'headline3','8/20/2012 12:01:53 PM' 
578924,'headline4','8/20/2012 12:01:59 PM' 
578925,'headline5','8/20/2012 12:01:59 PM' 
578926,'headline6','8/20/2012 12:01:59 PM' 
578927,'headline7','8/20/2012 12:01:59 PM' 
578928,'headline8','8/20/2012 12:02:03 PM' 

预期产量：

time,count
'8/20/2012 12:01:53 PM',3
'8/20/2012 12:01:59 PM',4
'8/20/2012 12:02:03 PM',1 

最佳答案

你累了吗：

SELECT COUNT(id),InDateTime
FROM news
GROUP BY InDateTime