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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


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Oracle RAC ÐÞ¸Ä IP µØÖ·


 
IP µØÖ·×öÈçÏÂÐ޸ģº
Public IP 10.85.10.119/121    -- >  10.85.10.219/221
Privite IP 192.168.1.119/121   -- >  192.168.1.219/221
Virtual IP 10.85.10.122/123   --  ......

oracle Set ÃüÁî½éÉÜ

oracle Set ÃüÁî½éÉÜ
http://luoke920.javaeye.com/blog/323743
1). ÉèÖõ±Ç°sessionÊÇ·ñ¶ÔÐ޸ĵÄÊý¾Ý½øÐÐ×Ô¶¯Ìá½»
SQL>SET AUTO[COMMIT] {ON|OFF|IMM[EDIATE]| n}
2)£®ÔÚÓÃstartÃüÁîÖ´ÐÐÒ»¸ösql½Å±¾Ê±£¬ÊÇ·ñÏÔʾ½Å±¾ÖÐÕýÔÚÖ´ÐеÄSQLÓï¾ä
SQL> SET ECHO {ON|OFF}
3).ÊÇ·ñÏÔʾµ±Ç°sqlÓï¾ä²éѯ»òÐ޸ĵÄÐÐÊý ......

OracleµÄPackageµÄ×÷ÓÃÒÔ¼°Ê¹ÓÃʲô¹¤¾ß±àд

1¡¢OracleµÄPackage³ýÁ˰Ѵ洢¹ý³Ì·Åµ½Ò»¶Ñ¶ùÒÔÍ⻹ÓÐûÓÐÆäËûµÄ×÷Ó㨺ô¦£©£¿
2¡¢ÈçºÎ°ÑÏÖÓеĴ洢¹ý³Ì¼ÓÈëµ½PackageÖУ¿
3¡¢³ýÁËʹÓÃSQL Plus£¬»¹ÓÐûÓÐʲô¹¤¾ß×öPackage?
4¡¢Ê¹ÓÃSQL Plus±àÒëPackage£¬ÊÇ·ñÿ´Î¶¼ÊDZàÒëPackageÖÐËùÓеĴ洢¹ý³Ì£¿
1¡¢Äã²»¾õµÃ°Ñ´æ´¢¹ý³Ì·ÖÃűðÀàÊǺÜÖØÒªµÄô£¬¶øÇÒ²»Í¬µÄpackageµÄ ......

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a.¸ñʽ£ºVariable_name [constant] databyte [not null] [:=default expression]
b.±äÁ¿Óë³£Á¿ÉùÃ÷»ù±¾Ò»Ö£¬Ê¹ÓÃconstantÉùÃ÷µÄΪ³£Á¿£¬²»Ê¹ÓÃΪ±äÁ¿£¬²¢ÇÒ¸³ÖµÖ»ÄÜÔÚDECLAREÇøÓò¸³Öµ£»
c.ʹÓÃ%TYPEºÍ%ROWTYPEÉùÃ÷¿ÉÒÔʹ±äÁ¿µÄÀàÐÍÓë±íÖÐ×Ö¶ÎÀàÐÍ»òÕû¸ö¼Ç¼ÀàÐͱ ......
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