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1.Y»òYY»òYYY ÄêµÄ×îºóһ룬Á½Î»»òÈýλ
SQL> Select to_char(sysdate,'Y') from dual;
TO_CHAR(SYSDATE,'Y')
--------------------
7
SQL> Select to_char(sysdate,'YY') from dual;
TO_CHAR(SYSDATE,'YY')
---------------------
07
SQL> Select to_char(sysdate,'YYY') from dual;
TO_CHAR(SYSDATE,'YYY')
----------------------
007
2.Q ¼¾¶È 1¡«3ÔÂΪµÚÒ»¼¾¶È£¬2±íʾµÚ¶þ¼¾¶È¡£
SQL> Select to_char(sysdate,'Q') from dual;
TO_CHAR(SYSDATE,'Q')
--------------------
2
3.MM Ô·ÝÊý
SQL> Select to_char(sysdate,'MM') from dual;
TO_CHAR(SYSDATE,'MM')
---------------------
05
4.RM Ô·ݵÄÂÞÂí±íʾ £¨VÔÚÂÞÂíÊý×ÖÖбíʾ 5£©
SQL> Select to_char(sysdate,'RM') from dual;
TO_CHAR(SYSDATE,'RM')
---------------------
V
5.Month ÓÃ9¸ö×Ö·û³¤¶È±íʾµÄÔ·ÝÃû
SQL> Select to_char(sysdate,'Month') from dual;
TO_CHAR(SYSDATE,'MONTH')
------------------------
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6.WW µ±ÄêµÚ¼¸ÖÜ £¨2007Äê5ÔÂ29ÈÕΪ2007ÄêµÚ22ÖÜ£©
SQL> Select to_char(sysdate,'WW') from dual;
TO_CHAR(SYSDATE,'WW')
---------------------
22
7.W ±¾Ôµڼ¸ÖÜ £¨2007Äê5ÔÂ29ÈÕΪ5ÔµÚ5ÖÜ£©
SQL> Select to_char(sysdate,'W') from dual;
TO_CHAR(SYSDATE,'W')
--------------------
5
8.DDD µ±ÄêµÚ¼¸Ìì £¨2007Äê5ÔÂ29ÈÕΪ2007ÄêµÚ149Ì죩
SQL> Select to_char(sysdate,'DDD') from dual;
TO_CHAR(SYSDATE,'DDD')
----------------------
149
9. DD µ±Ôµڼ¸Ìì
SQL> Select to_char(sysdate,'DD') from dual;
TO_CHAR(SYSDATE,'DD')
---------------------
29
10.D ÖÜÄÚµÚ¼¸Ìì
SQL> Select to_char(sysdate,'D') from dual;
TO_CHAR(SYSDATE,'D')
--------------------
3
11.DY ÖÐÎĵÄÐÇÆÚ¼¸ £¨ £¨2007Äê5ÔÂ29ÈÕΪÐÇÆÚ¶þ£©£©
SQL> Select to_char(sysdate,'DY') from dual;
TO_CHAR(SYSDATE,'DY')
---------------------
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12.HH»òHH12 12½øÖÆСʱÊý £¨16£º09·ÖΪÓÃ12СʱÖƼÆʱΪ4µã£©
SQL> Select to_char(sysdate,'HH') from dual;
TO_CHAR(SYSDATE,'HH')
---------------------
04
13.HH24 24СʱÖÆ
SQL> Select to_char(sysdate,'HH24') from dual;
TO_CH