ÔÚoracleÖйØÓÚÊ÷µÄsql
±ítask£¬×Ö¶Îid_£¬name_
id_µÄÊý¾ÝÈçÏÂÐÎʽ£º
1
1.1
1.1.1
1.1.1.2
1.2
1.2.1
...
10
10.1
10.1.1
10.2.1
10.2.1.1
10.2.1.1.1
10.2.1.1.2
.......
×¢£º“.”±êʶ¸¸×ӵĹØÏµ¡£
ÏÖÔÚͨ¹ýid_²éѯÊ÷½á¹¹µÄЧ¹û£¬²¢ÇÒÖªµÀ´Ë½ÚµãÊÇ·ñΪҶ×Ó½Úµãleaf¡£¡££¿
Óï¾äÈçÏ£º
select
id_ ,
name_ ,
(select count(id_) from task where t.id_= substr(id_,0,INSTR((id_),'.',-1)-1) ) as leaf,connect_by_isleaf from task t
start with t.id_ ='5' connect by prior
t.id_= substr(t.id_,0,INSTR((t.id_),'.',-1)-1) order by t.id_
Ïà¹ØÎĵµ£º
SQLµÄÓÅ»¯Ó¦¸Ã´Ó5¸ö·½Ãæ½øÐе÷Õû£º
1.È¥µô²»±ØÒªµÄ´óÐͱíµÄÈ«±íɨÃè
2.»º´æÐ¡ÐͱíµÄÈ«±íɨÃè
3.¼ìÑéÓÅ»¯Ë÷ÒýµÄʹÓÃ
4.¼ìÑéÓÅ»¯µÄÁ¬½Ó¼¼Êõ
5.¾¡¿ÉÄܼõÉÙÖ´Ðмƻ®µÄCost
SQLÓï¾ä£º
ÊǶÔÊý¾Ý¿â(Êý¾Ý)½øÐвÙ×÷µÄΩһ;¾¶£»
ÏûºÄÁË70%~90%µÄÊý¾Ý¿â×ÊÔ´£»¶ÀÁ¢ÓÚ³ÌÐòÉè¼ÆÂß¼£¬Ïà¶ÔÓÚ¶Ô³ÌÐòÔ´´úÂëµÄÓÅ»¯£¬¶ÔSQLÓï¾äµÄÓÅ» ......
×î½ü·¢ÏÖÒ»¸öÎÊÌ⣬һ¸ö9iÅÜÔÚredhat5µÄ£¬¾ÓÈ» select sysdate from dual ³öÀ´µÄʱ¼äºÍʵ¼Êʱ¼ä²îÁ˼¸·ÖÖÓ£¬ÒòΪ»ùÓÚÕâ¸öoracleµÄϵͳʱ¼äÕýÈ·ÐÔ»¹ÊÇÓеãÒªÇóµÄ¡£ËùÒÔÖ»ÄÜ #date -s 2010-2-10 8:55:00 ÁË£¬ÔÙ#clock -w дÈëCOMS ×¢ÒâÐÞ¸Äʱ¼äµÃÔÚrootÏ¡£
ÔÚϵͳÆô¶¯Ê±£¬Linux²Ù×÷ϵͳ½«Ê±¼ä´ÓCMOSÖжÁµ½ÏµÍ³Ê ......
´Ó¸ÅÄʾÀý—Oracle´´½¨³ÌÐò°ü
Ò»¡¢³ÌÐò°üµÄÏà¹ØÖªÊ¶
1.¶¨ÒåÓë˵Ã÷
a. Ïà¹Ø¶ÔÏóµÄ·â×°
b. ³ÌÐò°üµÄ¸÷²¿·Ö
- ³ÌÐò°ü¹æ¸ñ˵Ã÷
ÉùÃ÷×Ó³ÌÐò
- ³ÌÐò°üÖ÷Ìå
......
ÔÎĵØÖ·£ºhttp://www.dbabeta.com/2008/oracle_os_pwfile_authentication.html
±¾ÎĸÅÊöÓëʵÑé»·¾³
¸ÅÊö£º
±¾ÎÄÖ»ÌÖÂÛOSÈÏÖ¤ºÍ¿ÚÁîÎļþÈÏÖ¤·½Ê½µÄÅäÖ÷½·¨£¬ÈçºÎÅäÖÃÒÔ¼°Ê¹ÓÃOSÈÏÖ¤ºÍ¿ÚÁîÎļþÈÏÖ¤·½Ê½ÑéÖ¤SYSDBA/SYSOPERȨÏÞ¡£
ʵÑé»·¾³£º
Oracle 10.1 + Windows 2003 ºÍ Oracle 10.2 + RHEL 4
ÌØÊâȨÏÞÓëOracleµÇ½ ......
SQLPlusÊÇoracleÌṩµÄÒ»¸öÃüÁîÐÐÖ´ÐеŤ¾ß
SQLPlusÖÐÓÃÁ½ÖÖÃüÁ
sqlplus£ºÒÔÃüÁîÐеķ½Ê½½øÈëÊý¾Ý¿âÁ¬½Ó
sqlplusw£ºÒÔ´°¿ÚµÄÐÎʽÆô¶¯ÃüÁîÐй¤¾ß ×¢£ºÖ÷»ú×Ö·û´®£¬ÊäÈëÊý¾Ý¿âÃû³Æ
&n ......