之前我一直使用oracle,习惯了oracle的语法格式,现在换成mysql有些地方是有区别的,我在查询时间进行格式化的时候就发现问题了,现在在这做个记录 一般在oracle中利用 to_char或者to_date()
Oracleto_char函数的功能是将数值型或者日期型转化为字符型:
eg:
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期转化为字符串
select to_char(sysdate,'yyyy') as nowYear from dual; //获取时间的年
select to_char(sysdate,'mm') as nowMonth from dual; //获取时间的月
select to_char(sysdate,'dd') as nowDay from dual; //获取时间的日
select to_char(sysdate,'hh24') as nowHour from dual; //获取时间的时
select to_char(sysdate,'mi') as nowMinute from dual; //获取时间的分
select to_char(sysdate,'ss') as nowSecond from dual; //获取时间的秒
mysql 中使用 DATE_FORMAT:
select DATE_FORMAT(NOW(),'%Y-%m-%d') from dual