检查当前日期是否在两个日期之间Oracle SQL

如果当前日期通过oracle sql在2个日期之间,我想选择1.

在阅读其他问题后,我写了一个sql

https://stackoverflow.com/questions/2369222/oracle-date-between-query

https://stackoverflow.com/questions/2399753/select-from-table-by-knowing-only-date-without-time-oracle

但它只返回null. sysdate是日期格式为DD / MM / YYYY的01/05/2014的当前日期.

我写的sqls如下：

select 1 from dual 
WHERE to_date(sysdate,'DD/MM/YYYY') 
BETWEEN TO_DATE('28/02/2014','DD/MM/YYYY')
AND TO_DATE('20/06/2014','DD/MM/YYYY');

和

select 1 from dual 
WHERE to_date(sysdate,'DD/MM/YYYY') >= TO_DATE('28/02/2014','DD/MM/YYYY') 
AND to_date(sysdate,'DD/MM/YYYY') < TO_DATE('20/06/2014','DD/MM/YYYY');

在此先感谢您的帮助.

您不需要将to_date()应用于sysdate.已经在那里了

select 1
from dual 
WHERE sysdate BETWEEN TO_DATE('28/02/2014','DD/MM/YYYY') AND TO_DATE('20/06/2014','DD/MM/YYYY');

如果您关心日期的时间组件,则使用trunc()：

select 1
from dual 
WHERE trunc(sysdate) BETWEEN TO_DATE('28/02/2014','DD/MM/YYYY') AND
                             TO_DATE('20/06/2014','DD/MM/YYYY');