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SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
String tdate=sf.format(new Date());
String tdate1=tdate+" 00:00:00"; 
String tdate2=tdate+" 23:59:59"

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SQL code:
select count(1)
from Tab
where TO_CHAR(SYSDATE, 'yyyy-mm-dd') =TO_CHAR(date, 'yyyy-mm-dd') ;


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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
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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')


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