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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
Ïà¹ØÎĵµ£º
Á·Ï°:
drop table Employee;
create table Employee(
id number primary key,
  ......
Êý¾ÝÀàÐÍ
²ÎÊý
ÃèÊö
char(n)
n=1 to 2000×Ö½Ú
¶¨³¤×Ö·û´®£¬n×Ö½Ú³¤£¬Èç¹û²»Ö¸¶¨³¤¶È£¬È±Ê¡Îª1¸ö×Ö½Ú³¤£¨Ò»¸öºº×ÖΪ2×Ö½Ú£©
varchar2(n)
n=1 to 4000×Ö½Ú
¿É±ä³¤µÄ×Ö·û´®£¬¾ßÌ嶨ÒåʱָÃ÷×î´ó³¤¶Èn£¬
ÕâÖÖÊý¾ÝÀàÐÍ¿ÉÒÔ·ÅÊý×Ö¡¢×ÖĸÒÔ¼°ASCIIÂë×Ö·û¼¯(»òÕßEBCDICµÈÊý¾Ý¿âϵͳ½ÓÊܵÄ×Ö·û¼¯±ê×¼)ÖеÄËùÓзûºÅ¡£
Èç¹ ......
µÚÒ»ÖÖÇé¿ö£ºÎÞ·µ»ØÖµ.
create or replace procedure test_a(param1 in varchar2,param2 in varchar2) as
begin
insert into test value(param1,param2);
&nb ......
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Ò»¡¢ ³£ÓÃÈÕÆÚÊý¾Ý¸ñʽ
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 ......
Èí¼þ: VMware Workstation 6.0.2 build-59824
10201_database_linux32.zip
rhel.5.0.server.centoschina.com.dvd.iso
Îĵµ:ORACLE10G¹Ù·½°²×°Îĵµ B19306_01_Oracle10gR2.chm
²Î¿¼:Öܾ¼ÀÏʦµÄORACLE10G OCPÊÓÆµ(½²µÄÕæµÄ ......