一、检索使用

1、where时间筛选

2、date时间筛选错误

3、[Err] ORA-01861: literal does not match format string

 二、拿来即用
select * from t_name
where to_char(create_time,'YYYY-MM-DD') = '2021-05-20'
select * from t_name
where to_char(create_time,'YYYY-MM-DD hh24:mi:ss') >= '2021-05-20 00:00:00'