关于MySQL数据库如何按时间查询

这里做了几个测试

select * from simingpai where TIMESTAMP(createTime) >= '2015-9-6';
select * from simingpai where TIMESTAMP(createTime) >= '2015-9-6 00:00:00';
select * from simingpai where TIMESTAMP(createTime) >= '2015-9-6 18:15:00';
select * from simingpai where DATE(createTime) >= '2015-9-6';
select * from simingpai where DATE(createTime) >= '2015-9-6 00:00:00';
select * from simingpai where DATE(createTime) >= '2015-9-6 00:00:01';
select * from simingpai where DATE(createTime) >= '2015-9-6 18:15:00';

这几条语法都没有问题，TIMESTAMP类型支持时分秒，DATE类型第一条和第二条输出结果相同（估计是忽略了后面的时分秒），但是第三条和第四条语句就会报错。应该是不支持时分秒。

select * from simingpai where TIMESTAMP(createTime) >= 2015-9-6;
select * from simingpai where TIMESTAMP(createTime) >= 2015-9-6 00:00:00;
select * from simingpai where TIMESTAMP(createTime) >= 2015-9-6 18:15:00;
select * from simingpai where Date(createTime) >= 2015-9-6;
select * from simingpai where DATE(createTime) >= 2015-9-6 00:00:00;
select * from simingpai where DATE(createTime) >= 2015-9-6 00:00:01;
select * from simingpai where DATE(createTime) >= 2015-9-6 18:15:00;

这里的SQL语句中TIMESTAMP类型和DATE类型的第一条语句能输出结果，其他的都不正确。这种格式应该不支持时分秒。

按照时间进行查询

查询当天的所有数据

select * from tg_winner where year(createTime)=year(now()) and month(createTime)=month(now()) and day(createTime)=day(now());
select * from tg_winner where to_days(createTime) = to_days(now()); 
select * from tg_winner where date(createTime) = curdate();

查询某天的所有数据

select * from tg_winner where DATE(createTime) = '2015-9-6';
select * from tg_winner where to_days(createTime) = to_days('2015-09-06');
select * from tg_winner where createTime = date_format(#{createTime},'%Y-%m-%d %H:%i:%s');

#{createTime}为Mybatis的.xml文件中实体类对应的Date类型的字段。即要传入的日期类型的变量

mysql查询昨天一周前一月前一年前的数据

mysql 昨天一周前一月前一年前的数据这里主要用到了DATE_SUB，

参考如下

SELECT * FROM tg_winner
where createTime>DATE_SUB(CURDATE(), INTERVAL 1 DAY)
where createTime>DATE_SUB(CURDATE(), INTERVAL 1 WEEK)
where createTime>DATE_SUB(CURDATE(), INTERVAL 1 MONTH)
where createTime>DATE_SUB(CURDATE(), INTERVAL 1 YEAR

注意：如果数据库中时间以UNIX时间戳的形式存放的话，在时间对比上需要更改为统一格式：

DATE_SUB()返回的是格式化后的时间：2014-05-17

需要用UNIX_TIMESTAMP()转化为UNIX时间戳形式对比：

where createTime>UNIX_TIMESTAMP(DATE_SUB(CURDATE(), INTERVAL 1 DAY))
where createTime>UNIX_TIMESTAMP(DATE_SUB(CURDATE(), INTERVAL 1 WEEK)) 
where createTime>UNIX_TIMESTAMP(DATE_SUB(CURDATE(), INTERVAL 1 MONTH)) 
where createTime>UNIX_TIMESTAMP(DATE_SUB(CURDATE(), INTERVAL 1 YEAR))

createTime为数据库的时间字段