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【oracle】简单的日期时间的格式化与排序问题
2022-07-06 23:28:00 【kenwm】
所谓格式化日期指的是将日期转为字符串,或将字符串转为日期,下面几个函数可以用来格式化日期。
TO_CHAR(datetime, 'format')
TO_DATE(character, 'format')
TO_TIMESTAMP(character, 'format')
TO_TIMESTAMP_TZ(character, 'format')
例子
select to_char(a.CREATE_TIME,'yyyy-mm-dd') from students
select * from 表名 where 这里面可以加条件 ORDER BY 日期字段 desc,时间字段 desc
这个是写一个ORDER BY关键字根据日期字段排序然后加个逗号接着写时间字段排序
select to_char(a.CREATE_TIME,'yyyy-mm-dd') from students
where a.s_name like '%黄' order by a.create_time
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