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Oracle Êý×Öº¯ÊýÓ÷¨

 1. round(Num,n) :  ËÄÉáÎåÈëÊý×ÖNum£¬±£ÁônλСÊý£¬²»Ð´NĬÈϲ»ÒªÐ¡Êý£¬ËÄÉáÎåÈëµ½ÕûÊý¸öλ
 select ROUND(21.237,2) from dual; 
 ½á¹û£º 21.24
 2. trunc(Num,n) : ½ØÈ¡Êý×ÖNum£¬±£ÁônλСÊý£¬²»Ð´NĬÈÏÊÇ0£¬¼´²»ÒªÐ¡Êý
 select TRUNC(21.237,2) from dual;
 ½á¹û£º21.23
 3.MOD(m,n) £º ·µ»Øm³ýÒÔnµÄÓàÊý


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Oracle developerÒÔÆä¿ìËÙµÄÊý¾Ý´¦Àí¿ª·¢¶øÎÅÃû£¬ÆäÒì³£´¦Àí»úÖÆÒ²ÊDZȽÏÍêÉÆ£¬²»¿ÉСêï¡£
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oracle ÅÅÐòÄÚ´æ

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Oracle Dimension £¨Oracle ά£©

 
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Oracle 1Z0

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¹ØÓÚORACLE ORA

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¾­³£±À³ö"ORA-01846: not a valid day of the week
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SQL> select next_day(sysdate,'FRIDAY') from DUAL;
 select next_day(sysdate,'FRIDAY') from DUAL
 ORA-01 ......
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