mysql数据库表示时间的字段为什么可以用int类型啊这样与datetime相比有什么好处？该怎么处理-PHP Tutorial-php.cn

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mysql数据库表示时间的字段为什么可以用int类型啊这样与datetime相比有什么好处？该怎么处理

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Jun 13, 2016 am 10:15 AM

datetimeintmysqlphp

mysql数据库表示时间的字段为什么可以用int类型啊，这样与datetime相比有什么好处？
我看到一些mysql数据库的设计，比如phpwind论坛的表示时间的字段，用int(10) ? 表示，表示时间本来就有datetime类型啊，为什么要用int型呢？这样做有什么好处啊，希望大哥们指点一二，感激涕零～

------解决方案--------------------
如果考虑有时区问题的就用int型的..
如果考虑读取方便的就用datetime型的...
------解决方案--------------------
因为 ? phpwind排序是用最后发表时间lastpost
数据量大时候int型比varchar快很多

------解决方案--------------------
可能的优点:
1、好排序，比如，我要最新新闻记录，只要排序desc就行了
2、方便转换，因为INT是在mysql ? 里，存的是时间戳。就不用格式转换了。否则，PHP和mysql里的时间是不一样的，存取要转换。
用inT，数据库就不用动了，格式化在 ? php进行。
3、方便时间计算。unix时间优点就是方例计算。

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