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mysql查询时间戳跟日期的转换

Jun 07, 2016 pm 04:15 PM
mysql date time Inquire Convert

mysql查询时间戳和日期的转换 在数据库的使用中,经常需要按指定日期来查询记录,以便于统计,而在数据库中,有很多存储的是时间戳, 也有的直接存日期,查询的时候可能不是那么好弄. mysql提供了两个函数: from_unixtime(time_stamp) - 将时间戳转换为日期 unix_ti

mysql查询时间戳和日期的转换

在数据库的使用中,经常需要按指定日期来查询记录,以便于统计,而在数据库中,有很多存储的是时间戳,

也有的直接存日期,查询的时候可能不是那么好弄.

mysql提供了两个函数:

          from_unixtime(time_stamp)   ->  将时间戳转换为日期

          unix_timestamp(date)             ->  将指定的日期或者日期字符串转换为时间戳


如:   from_unixtime(time_stamp)

select from_unixtime(1382544000);
+---------------------------+
| from_unixtime(1382544000) |
+---------------------------+
| 2013-10-24 00:00:00       |
+---------------------------+
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如: unix_timestamp(date) 

select unix_timestamp(date('2013-10-24'));
+------------------------------------+
| unix_timestamp(date('2013-10-24')) |
+------------------------------------+
|                         1382544000 |
+------------------------------------+
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如果要查询当天的订单的记录:

 select count(*) from b_order Where  date_format(from_unixtime(create_time),'%Y-%m-%d') = date_format(now(),'%Y-%m-%d')
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也可以这样:

select count(*) from b_order Where  create_time >= unix_timestamp('2013-10-24 00:00:00') and create_time 
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