Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

oracleµÄÊý¾ÝÀàÐÍ

ÔÚORACLE8Öж¨ÒåÁË£º±êÁ¿(Scalar)¡¢¸´ºÏ(COMPOSITE)¡¢ÒýÓÃ(REFERENCE)ºÍLOBËÄÖÖÊý¾ÝÀàÐÍ¡£
£¨Ò»£©±êÁ¿(Scalar)
    ±êÁ¿ÀàÐÍÓëÊý¾Ý¿âµÄÁÐËùʹÓõÄÀàÐÍÏàͬ£¬´ËÍâËü»¹ÓÐһЩÀ©Õ¹¡£
    ËüÓÖ·ÖΪÆß¸ö×飺Êý×Ö¡¢×Ö·û¡¢ÐС¢ÈÕÆÚ¡¢Ðбêʶ¡¢²¼¶ûºÍ¿ÉÐÅ¡£
¢ÙÊý×Ö
¡¡
    ÓÐÈýÖÖ»ù±¾ÀàÐÍ:NUMBER¡¢PLS_INTEGERºÍBINARY_INTENER¡£
NUMBER
    ¿ÉÒÔÃèÊöÕûÊý»òʵÊý£¬¶øPLS_INTEGERºÍBINARY_INTENERÖ»ÄÜÃèÊöÕûÊý¡£ NUMBER£¬ÊÇÒÔÊ®½øÖƸñʽ½øÐд洢µÄ£¬Ëü±ãÓÚ´æ´¢£¬µ«ÊÇÔÚ¼ÆËãÉÏ£¬ÏµÍ³»á×Ô¶¯µÄ½«Ëüת»»³ÉΪ¶þ½øÖƽøÐÐÔËËãµÄ¡£ËüµÄ¶¨Ò巽ʽÊÇNUMBER(P£¬S)£¬PÊǾ«¶È£¬×î´ó38룬SÊǿ̶ȷ¶Î§£¬¿ÉÔÚ-84...127¼äȡֵ¡£ÀýÈ磺NUMBER(5£¬2)¿ÉÒÔÓÃÀ´´æ´¢±íʾ-999.99...999.99 ¼äµÄÊýÖµ¡£
P¡¢S¿ÉÒÔÔÚ¶¨ÒåÊÇÊ¡ÂÔ£¬ÀýÈ磺NUMBER(5)¡¢NUMBERµÈ£»
BINARY_INTENER
      ÓÃÀ´ÃèÊö²»´æ´¢ÔÚÊý¾Ý¿âÖУ¬µ«ÊÇÐèÒªÓÃÀ´¼ÆËãµÄ´ø·ûºÅµÄÕûÊýÖµ¡£ËüÒÔ2µÄ²¹Âë¶þ½øÖÆÐÎʽ±íÊö¡£Ñ­»·¼ÆÊýÆ÷¾­³£Ê¹ÓÃÕâÖÖÀàÐÍ¡£
PLS_INTEGER
      ºÍBINARY_INTENERÎ¨Ò»Çø±ðÊÇÔÚ¼ÆËãµ±Öз¢ÉúÒç³öʱ£¬BINARY_INTENERÐ͵ıäÁ¿»á±»×Ô¶¯Ö¸ÅɸøÒ»¸öNUMBERÐͶø²»»á³ö´í£¬PLS_INTEGERÐ͵ıäÁ¿½«»á·¢Éú´íÎó¡£
¢Ú×Ö·û¡¡°üÀ¨CHAR¡¢VARCHAR2(VARCHAR)¡¢LONG¡¢NCHARºÍNVARCHAR2¼¸ÖÖÀàÐÍ¡£
CHAR¡¡
ÃèÊö¶¨³¤µÄ×Ö·û´®£¬Èç¹ûʵ¼ÊÖµ²»¹»¶¨ÒåµÄ³¤¶È£¬ÏµÍ³½«ÒÔ¿Õ¸ñÌî³ä¡£ËüµÄÉùÃ÷·½Ê½ÈçÏÂ
CHAR(L)¡¡
LΪ×Ö·û´®³¤¶È£¬È±Ê¡Îª1£¬×÷Ϊ±äÁ¿×î´ó32767¸ö×Ö·û£¬×÷ΪÊý¾Ý´æ´¢ÔÚORACLE8ÖÐ×î´óΪ2000¡£
VARCHAR2(VARCHAR)
¡¡ÃèÊö±ä³¤×Ö·û´®¡£ËüµÄÉùÃ÷·½Ê½ÈçÏ VARCHAR2(L)£¬LΪ×Ö·û´®³¤¶È£¬Ã»ÓÐȱʡֵ£¬×÷Ϊ±äÁ¿×î´ó32767¸ö×Ö½Ú£¬×÷ΪÊý¾Ý´æ´¢ÔÚORACLE8ÖÐ×î´óΪ4000¡£ÔÚ¶à×Ö½ÚÓïÑÔ»·¾³ÖУ¬Êµ¼Ê´æ´¢µÄ×Ö·û¸öÊý¿ÉÄÜСÓÚLÖµ£¬ÀýÈ磺µ±ÓïÑÔ»·¾³ÎªÖÐÎÄ(SIMPLIFIED CHINESE_CHINA.ZHS16GBK)ʱ£¬Ò»¸öVARCHAR2(200)µÄÊý¾ÝÁпÉÒÔ±£´æ200¸öÓ¢ÎÄ×Ö·û»òÕß100¸öºº×Ö×Ö·û¡£
LONG
¡¡ÔÚÊý¾Ý¿â´æ´¢ÖпÉÒÔÓÃÀ´±£´æ¸ß´ï2GµÄÊý¾Ý£¬×÷Ϊ±äÁ¿£¬¿ÉÒÔ±íʾһ¸ö×î´ó³¤¶ÈΪ32760×ֽڵĿɱä×Ö·û´®¡£
NCHAR¡¢NVARCHAR2
¡¡¹ú¼Ò×Ö·û¼¯£¬Óë»·¾³±äÁ¿NLSÖ¸¶¨µÄÓïÑÔ¼¯ÃÜÇÐÏà¹Ø£¬Ê¹Ó÷½·¨ºÍCHAR¡¢VARCHAR2Ïàͬ¡£
¢ÛÐÐ
°üÀ¨RAWºÍLONG RAWÁ½ÖÖÀàÐÍ¡£ÓÃÀ´´æ´¢¶þ½øÖÆÊý¾Ý£¬²»»áÔÚ×Ö·û¼¯¼äת»»¡£
RAW
ÀàËÆÓÚCHAR£¬ÉùÃ÷·½Ê½RAW(L)£¬LΪ³¤¶È£¬ÒÔ


Ïà¹ØÎĵµ£º

oracle ±í¿Õ¼ä²Ù×÷

oracle±í¿Õ¼ä²Ù×÷Ïê½â
  1
  2
  3×÷Õߣº   À´Ô´£º    ¸üÐÂÈÕÆÚ£º2006-01-04 
  5
  6 
  7½¨Á¢±í¿Õ¼ä
  8
  9CREATE TABLESPACE data01
 10DATAFILE '/ora ......

oracle¸´Ï°£¨Ò»£© Ö®OracleÌåϵ½á¹¹

      ѧϰOracle DBAÒ²°ë¸ö¶àѧÆÚÁË£¬½ñÌìÃÍÈ»²Å·¢ÏÖ£¬Ô­À´ÎÒµÄÊ黹ÊǺÜеģ¬ÉϿβÙ×÷ʱºòÒ²Ö»ÊÇÖªµÀ´ó¸ÅÔõô×ö£¬µ«ÊÇÒªÕæµÄÈ«²¿×Ô¼º×ö£¬¶ø²»È¥·­Ê黹ÊÇÓÐÒ»¶¨µÄÄѶȵģ¬ËùÒÔÄØ£¬½ñÌ쿪ʼ½«DBA´ÓÍ·¸´Ï°Ò»±é£¬Í¬Ê±ÔÙ²Ù×÷Ò»±é¡£
      µÚÒ»Õ£¬Ñ§µÄÊÇOracleµÄÌåϵ½á¹¹£ ......

oracleÖÐDateÀàÐÍ×Ö¶ÎÊý¾Ý²åÈë¸ñʽ

   oracle±íÖÐÓÐDateÀàÐ͵Ä×ֶΣ¬ÓÃPD×Ô¶¯Éú³É²âÊÔÊý¾Ý£¬¸ñʽΪ‘yyyy-mm-dd’£¬¶øoracleÖвåÈëDateÀàÐ͵Ä×ֶθñʽΪ'dd-mmÔÂ-yyyy'¡£Èç¹ûÊý¾ÝÁ¿ÉÙ£¬¿ÉÒÔÓÃto_date()£¬
to_date('2008-01-25 12:39:49','YYYY-MM-DD HH24:MI:SS')
µ«ÊDzâÊÔÓÃÊý¾ÝÓÐ10ÍòÌõ£¬Èç¹ûÊܶ¯È¥Ð´ÏÔÈ»ÊDz»Êµ¼ÊµÄ¡ ......

OracleÊý¾Ý¿âDBFÎļþÎóɾ³ý½â¾ö·½°¸

·¢ÏÖ´íÎó£ºÊý¾Ý¿âδ´ò¿ª: ½öÔÊÐíÔڹ̶¨±í/ÊÓͼÖвéѯ
½â¾ö·½°¸£º
1. ÔÚÔËÐÐ-->ÃüÁîÀïÊäÈësqlplus /nologÈ»ºó»Ø³µ£¬
2. ÒÔsysdbaµÄ½ÇÉ«µÇ¼£ºconnect sys/¿ÚÁî as sysdba
3. ÏÈÖ´ÐДalter database open”£¬»á³öÏÖÈçϵĴíÎó
µÚ 1 ÐгöÏÖ´íÎó:
ORA-01157: ÎÞ·¨±êʶ/Ëø¶¨Êý¾ÝÎļþ 6 - Çë² ......

ͨ¹ý´´½¨ÐòÁÐÀ´ÊµÏÖORACLE SEQUENCEµÄ¼òµ¥½éÉÜ

ÔÚoracleÖÐsequence¾ÍÊÇËùνµÄÐòÁкţ¬Ã¿´ÎÈ¡µÄʱºòËü»á×Ô¶¯Ôö¼Ó£¬Ò»°ãÓÃÔÚÐèÒª°´ÐòÁкÅÅÅÐòµÄµØ·½¡£
1¡¢Create Sequence
ÄãÊ×ÏÈÒªÓÐCREATE SEQUENCE»òÕßCREATE ANY SEQUENCEȨÏÞ£¬
CREATE SEQUENCE emp_sequence
INCREMENT BY 1 -- ÿ´Î¼Ó¼¸¸ö
START WITH 1 -- ´Ó1¿ªÊ¼¼ÆÊý
NOMAXVALUE -- ²»ÉèÖÃ×î´óÖµ
NOCY ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ