Home Database Mysql Tutorial Oracle中查询同一个日期字段,格式不同的问题

Oracle中查询同一个日期字段,格式不同的问题

Jun 07, 2016 pm 05:06 PM
oracle database

数据库中某日期字段有如下数据,sql语句如下: select age, money, birthday from userinfo 仔细观察,日期字段有两种格式

数据库中某日期字段有如下数据,sql语句如下:

  • select age, money, birthday from userinfo  
  • 仔细观察,,日期字段有两种格式的内容,一种带时间的,一种不带时间的,在项目中很可能是由于需求变动导致格式调整引起,假如我们只想查询带有时间的这种数据如何来处理,真实想通过length函数判断长度,发现不能达到目的,不管那种内容返回的长度相同,于是想到如下解决办法,请看SQL。

  • select age, money, birthday, substr(to_char(birthday,'hh24:mi:ss')   
  • from userinfo where substr(to_char(birthday,'hh24:mi:ss'),1)!= '00:00:00';  
  • 结果如下:

    这只是同事问我的时候我给出的临时方案,有更好的方法的达人回复我下,谢谢!

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