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SQL> Select to_char(sysdate,'Y') from dual;
TO_CHAR(SYSDATE,'Y')
--------------------
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SQL> Select to_char(sysdate,'YY') from dual;
TO_CHAR(SYSDATE,'YY')
---------------------
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SQL> Select to_char(sysdate,'YYY') from dual;
TO_CHAR(SYSDATE,'YYY')
----------------------
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SQL> Select to_char(sysdate,'Q') from dual;
TO_CHAR(SYSDATE,'Q')
--------------------
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3.MM Ô·ÝÊý
SQL> Select to_char(sysdate,'MM') from dual;
TO_CHAR(SYSDATE,'MM')
---------------------
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SQL> Select to_char(sysdate,'RM') from dual;
TO_CHAR(SYSDATE,'RM')
---------------------
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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')
---------------------
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7.W ±¾Ôµڼ¸ÖÜ £¨2007Äê5ÔÂ29ÈÕΪ5ÔµÚ5ÖÜ£©
SQL> Select to_char(sysdate,'W') from dual;
TO_CHAR(SYSDATE,'W')
--------------------
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SQL> Select to_char(sysdate,'DDD') from dual;
TO_CHAR(SYSDATE,'DDD')
----------------------
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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')
--------------------
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11.DY ÖÐÎĵÄÐÇÆÚ¼¸ £¨ £¨2007Äê5ÔÂ29ÈÕΪÐÇÆÚ¶þ£©£©
SQL> Select to_char(sysdate,'DY') from dual;
TO_CHAR(SYSDATE,'DY')
---------------------
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SQL> Select to_char(sysdate,'HH') from dual;
TO_CHAR(SYSDATE,'HH')
---------------------
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13.HH24 24Ð¡Ê±ÖÆ
SQL> Select to_char(sysdate,'HH24') from dual;
TO_CHAR(SYSDATE,'HH24')
-----------------------
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