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01 | 话说有一文章表article,存储文章的添加文章的时间是add_time字段,该字段为int(5)类型的,现需要查询今天添加的文章总数并且按照时间从大到小排序,则查询语句如下: |
03 | 1 select * from `article` where date_format(from_UNIXTIME(`add_time`),'%Y-%m-%d') = date_format(now(),'%Y-%m-%d'); |
06 | 1 select * from `article` where to_days(date_format(from_UNIXTIME(`add_time`),'%Y-%m-%d')) = to_days(now()); |
07 | 假设以上表的add_time字段的存储类型是DATETIME类型或者TIMESTAMP类型,则查询语句也可按如下写法: |
11 | 1 select * from `article` where to_days(`add_time`) = to_days(now()); |
14 | 1 select * from `article` where to_days(now()) – to_days(`add_time`) <= 1; |
17 | 1 select * from `article` where date_sub(curdate(), INTERVAL 7 DAY) <= date(`add_time`); |
20 | 1 select * from `article` where date_sub(curdate(), INTERVAL 30 DAY) <= date(`add_time`); |
23 | 1 select * from `article` where date_format(`add_time`, ‘%Y%m') = date_format(curdate() , ‘%Y%m'); |
26 | 1 select * from `article` where period_diff(date_format(now() , ‘%Y%m') , date_format(`add_time`, ‘%Y%m')) =1; |
31 | 就像它的名字一样,它是将具体的某一个日期或时间字符串转换到某一天所对应的unix时间戳,如: |
33 | 01 mysql> select to_days('2010-11-22 14:39:51'); |
34 | 02 +--------------------------------+ |
35 | 03 | to_days('2010-11-22 14:39:51') | |
36 | 04 +--------------------------------+ |
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