ORACLE——日期时间格式化参数详解 之二

SQL> select to_char(sysdate,‘DD YYYY-MM-DD PM hh24:mi:ss ‘) from dual;
TO_CHAR(SYSDATE,‘DDYYYY-MM-DDP‘)
------------------------------
27 2015-12-27 下午 18:12:08

SQL> select to_char(sysdate,‘DDD YYYY-MM-DD PM hh24:mi:ss ‘) from dual;
TO_CHAR(SYSDATE,‘DDDYYYY-MM-DD‘)
------------------------------
361 2015-12-27 下午 18:13:15

select to_char(sysdate,‘Day YYYY-MM-DD PM hh24:mi:ss ‘) from dual;
TO_CHAR(SYSDATE,‘DAYYYYY-MM-DD‘)
-----------------------------------
星期日 2015-12-27 下午 18:46:23

SQL> select to_char(sysdate,‘MON YYYY-MM-DD PM hh24:mi:ss ‘) from dual;
TO_CHAR(SYSDATE,‘MONYYYY-MM-DD‘)
----------------------------------
12月 2015-12-27 下午 18:47:33

SQL> select to_char(sysdate,‘MONTH YYYY-MM-DD PM hh24:mi:ss ‘) from dual;
TO_CHAR(SYSDATE,‘MONTHYYYY-MM-‘)
--------------------------------
12月 2015-12-27 下午 18:48:44

SQL>  select to_char(sysdate,‘MM‘) from dual;
TO_CHAR(SYSDATE,‘MM‘)
---------------------
12

SQL>  select to_char(sysdate,‘HH‘) from dual;
TO_CHAR(SYSDATE,‘HH‘)
---------------------
06

select to_char(sysdate,‘HH12‘) from dual;
TO_CHAR(SYSDATE,‘HH12‘)
-----------------------
06

SQL> select to_char(sysdate,‘HH24‘) from dual;
TO_CHAR(SYSDATE,‘HH24‘)
-----------------------
18

SQL> select to_char(sysdate,‘MI‘) from dual;
TO_CHAR(SYSDATE,‘MI‘)
---------------------
59

SQL> select to_char(sysdate,‘SS‘) from dual;
TO_CHAR(SYSDATE,‘SS‘)
---------------------
13

SQL> select to_char(SYSTIMESTAMP,‘FF9‘) from dual;
TO_CHAR(SYSTIMESTAMP,‘FF9‘)
---------------------------
487000000

SQL> select to_char(SYSTIMESTAMP,‘FF4‘) from dual;
TO_CHAR(SYSTIMESTAMP,‘FF4‘)
---------------------------
4740

SQL> select to_char(SYSTIMESTAMP,‘FF6‘) from dual;
TO_CHAR(SYSTIMESTAMP,‘FF6‘)
---------------------------
032000