SQL中日期格式的處理to_char函式
阿新 • • 發佈：2019-01-04
1. 日期和字元轉換函式用法（to_date,to_char）
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期轉化為字串
select to_char(sysdate,'yyyy') as nowYear from dual; //獲取時間的年
select to_char(sysdate,'mm') as nowMonth from dual; //獲取時間的月
select to_char(sysdate,'dd') as nowDay from dual; //獲取時間的日
select to_char(sysdate,'hh24') as nowHour from dual; //獲取時間的時
select to_char(sysdate,'mi') as nowMinute from dual; //獲取時間的分
select to_char(sysdate,'ss') as nowSecond from dual; //獲取時間的秒
select to_date('2004-05-07 13:23:44','yyyy-mm-dd hh24:mi:ss') from dual//
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期轉化為字串
select to_char(sysdate,'yyyy') as nowYear from dual; //獲取時間的年
select to_char(sysdate,'mm') as nowMonth from dual; //獲取時間的月
select to_char(sysdate,'dd') as nowDay from dual; //獲取時間的日
select to_char(sysdate,'hh24') as nowHour from dual; //獲取時間的時
select to_char(sysdate,'mi') as nowMinute from dual; //獲取時間的分
select to_char(sysdate,'ss') as nowSecond from dual; //獲取時間的秒
select to_date('2004-05-07 13:23:44','yyyy-mm-dd hh24:mi:ss') from dual//