Oracle¼àÌý³ÌÐòµ±Ç°ÎÞ·¨Ê¶±ðÁ¬½ÓÃèÊö·ûÖÐÇëÇóµÄ·þÎñ
°²×°ºÃÁËÖ®ºó¿ÉÒÔͨ¹ýÕâ¸ö·¾¶ÕÒµ½Ò»¸öÎı¾Îļþ£º
oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora »¹Ò»¸öÔÚͬ·¾¶ÏµÄtnsnames.oraÎļþ£¬ÕâÁ½¸öÎı¾ÖеÄһЩÐÅÏ¢ÒªÒ»ÑùµÄ¡£
Äã¿´¿´ÎÒµÄÕâÁ½¸öÎı¾ÎļþµÄÐÅÏ¢£º
listener.ora
# listener.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = F:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = F:\oracle\product\10.2.0\db_1)
(SID_NAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
)
)
tnsnames.ora
# tnsnames.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by oracle configuration tools.
orCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
 
Ïà¹ØÎĵµ£º
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
-- ......
ÿ¸öOracleÓû§¶¼ÓÐÒ»¸öÃû×ֺͿÚÁî,²¢ÓµÓÐһЩÓÉÆä´´½¨µÄ±í¡¢ÊÓͼºÍÆäËû×ÊÔ´¡£Oracle½ÇÉ«£¨role£©¾ÍÊÇÒ»×éȨÏÞ£¨privilege£©(»òÕßÊÇÿ¸öÓû§¸ù¾ÝÆä״̬ºÍÌõ¼þËùÐèµÄ·ÃÎÊÀàÐÍ)¡£Óû§¿ÉÒÔ¸ø½ÇÉ«ÊÚÓè»ò¸³ÓèÖ¸¶¨µÄȨÏÞ£¬È»ºó½«½ÇÉ«¸³¸øÏàÓ¦µÄÓû§¡£Ò»¸öÓû§Ò²¿ÉÒÔÖ±½Ó¸øÆäËûÓû§ÊÚȨ¡£
Êý¾Ý¿âϵͳȨÏÞ£¨Dat ......
High Water Mask£¨×î¸ßˮλÏߣ¬ºÇºÇ£©ÒÔϼò³ÆHWM
deleteÃüÁî²»Ó°Ïì±í×ÔÉíµÄHWM£¬¼´±íÖеÄÇø¿é»áËæ×ÅÊý¾ÝÁ¿µÄÔö´ó¶øÔö´ó£¬µ«É¾³ýÊý¾Ýʱ£¬
Çø¿é²¢²»»á¼õÉÙ£¬µ±²éѯʱ£¬»á°´ÕÕHWMµÄ±ê׼ȥɨÃè±í£¬¼´Ê¹Ê¹ÓÃdelete½«±íÊý¾ÝÇå¿Õ£¬²éѯʱ£¬
ÒÀ¾É»áɨÃèHWMµÄÇø¿é£¬²éѯËÙ¶ÈÒ²¾ÍºÍûʹÓÃdeleteÃüÁî֮ǰÊÇÒ»ÑùµÄ£¬¶øtruncate¿ÉÒÔ½ ......
ÔÚʵ¼Ê¹¤×÷ÖУ¬¾³£Òª´ÓÊý¾Ý¿âÖе¼³öÊý¾Ý»òÍùÊý¾Ý¿âÖе¼ÈëÊý¾Ý¡£µ±Óöµ½Êý¾ÝÁ¿½Ï´óʱ£¬¾ÍÐèÒªµ¼ÈëÎı¾¸ñʽµÄÊý¾Ý£¬Ò»°ãµ¼ÈëµÄÊý¾Ý¸ñʽÓÐtxt£¬csvµÈ¡£ÒÔÏÂÖ÷Òª½éÉÜÎÒÔÚʵ¼Ê¹¤×÷ÖÐÏòoracleÖе¼ÈëÊý¾ÝµÄÁ½¸öʵÀý¡£
1.ʹÓÃPL/SQL DeveloperµÄText Importer
£¨1£©´Ó²Ëµ¥ÖÐѡȡText Importer¹¦ÄÜ¡£
Tool&mda ......
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¡ ......