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

ORACLEº¯Êý´óÈ«


SQLÖеĵ¥¼Ç¼º¯Êý
1.ASCII
·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;
SQL> select ascii('A') A,ascii('a') a,ascii('0') zero,ascii(' ') space from dual;
        A         A      ZERO     SPACE
--------- --------- --------- ---------
       65        97        48        32
2.CHR
¸ø³öÕûÊý,·µ»Ø¶ÔÓ¦µÄ×Ö·û;
SQL> select chr(54740) zhao,chr(65) chr65 from dual;
ZH C
-- -
ÕÔ A
3.CONCAT
Á¬½ÓÁ½¸ö×Ö·û´®;
SQL> select concat('010-','88888888')||'ת23'  ¸ßǬ¾ºµç»° from dual;
¸ßǬ¾ºµç»°
----------------
010-88888888ת23
4.INITCAP
·µ»Ø×Ö·û´®²¢½«×Ö·û´®µÄµÚÒ»¸ö×Öĸ±äΪ´óд;
SQL> select initcap('smith') upp from dual;
UPP
-----
Smith
5.INSTR(C1,C2,I,J)
ÔÚÒ»¸ö×Ö·û´®ÖÐËÑË÷Ö¸¶¨µÄ×Ö·û,·µ»Ø·¢ÏÖÖ¸¶¨µÄ×Ö·ûµÄλÖÃ;
C1    ±»ËÑË÷µÄ×Ö·û´®
C2    Ï£ÍûËÑË÷µÄ×Ö·û´®
I     ËÑË÷µÄ¿ªÊ¼Î»ÖÃ,ĬÈÏΪ1
J     ³öÏÖµÄλÖÃ,ĬÈÏΪ1
SQL> select instr('oracle traning','ra',1,2) instring from dual;
 INSTRING
---------
        9
6.LENGTH
·µ»Ø×Ö·û´®µÄ³¤¶È;
SQL> select name,length(name),addr,length(addr),sal,length(to_char(sal)) from gao.nchar_tst;
NAME   LENGTH(NAME) ADDR             LENGTH(ADDR)       SAL LENGTH(TO_CHAR(SAL))
------ ------------ ---------------- ------------ --------- --------------------
¸ßǬ¾º            3 ±±¾©Êк£¶§Çø                6   9999.99                  &nbs


Ïà¹ØÎĵµ£º

Oracle¶àÐмǼºÏ²¢/Á¬½Ó/¾ÛºÏ×Ö·û´®µÄ¼¸ÖÖ·½·¨

ʲôÊǺϲ¢¶àÐÐ×Ö·û´®£¨Á¬½Ó×Ö·û´®£©ÄØ£¬ÀýÈ磺
SQL> desc test;
Name     Type          Nullable Default Comments
------- ------------ -------- ------- --------
COUNTRY VARCHAR2(20) Y       &nb ......

Oracle´æ´¢¹ý³Ì°üº¬Èý²¿·Ö

Oracle´æ´¢¹ý³Ì°üº¬Èý²¿·Ö£º¹ý³ÌÉùÃ÷£¬Ö´Ðйý³Ì²¿·Ö£¬´æ´¢¹ý³ÌÒì³£¡£
Oracle´æ´¢¹ý³Ì¿ÉÒÔÓÐÎÞ²ÎÊý´æ´¢¹ý³ÌºÍ´ø²ÎÊý´æ´¢¹ý³Ì¡£ 
Ò»¡¢Î޲γÌÐò¹ý³ÌÓï·¨
 
1 create or replace procedure NoParPro
2 as  ;
3 begin
4 ;
5 exception  &nb ......

oracleËéÆ¬Ð¡½á

author£ºskate
time£º2010-05-31
ÎÒÃÇÔÚʹÓÃwindowsµÄʱºò£¬¶¼ÖªµÀÒª¶¨ÆÚÕûÀí´ÅÅÌË鯬£¬ÒòΪ´ÅÅÌË鯬»áÓ°ÏìÐÔÄÜ£¬¸ø¹ÜÀíÉÏ´øÀ´¶îÍâµÄ
¸ºµ£¡£ÄÇoracle¸üÊÇÈç´Ë£¬µ±Ëæ×ÅÊý¾ÝÔö¼Ó£¬oracle´¦Àíº£Á¿Êý¾Ý±¾Éí¾ÍÒѾ­ºÜ·ÑÁ¦Á˰¡£¬Èç¹ûÔÙÓдóÁ¿
µÄË鯬£¬ÄǾÍÊÇÑ©ÉϼÓ˪°¡¡£ËùÒÔËéÆ¬ÒªÒýÆðdbaµÄ¸ß¶ÈÖØÊÓ£¬¾¡Ôç·¢ÏÖ¾¡Ôç´¦Àí¡£
莮 ......

linux oracleËõС»Ø¹ö±í¿Õ¼ä´óСundotbs01.dbf


http://hi.baidu.com/lu_xinzhong/blog/item/4ff92b1725dec505c83d6d09.html
»Ø¹ö±í¿Õ¼ä´óС
-- ´´½¨Ò»¸öеÄС¿Õ¼äµÄUNDO TABLESPACE
Create UNDO TABLESPACE UNDOTBS2 DATAFILE '/u01/app/oracle/oradata/orcl/UNDOTBS02.DBF' SIZE 100M REUSE AUTOEXTEND ON;
-- ÉèÖÃеıí¿Õ¼äΪϵͳUNDO_TABLESPACE
Alter SYSTE ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ