oracleÖ®createÓ÷¨
create database --´´½¨Êý¾Ý¿â
create database test
controlfile reuse
datafile 'd:\data\system1.dbf' size 100m autoextend on next 100m maxsize unlimited
sysaux datafile 'd:\data\sysaux1.dbf' size 100m reuse autoextend on next 100m maxsize unlimited
default temporary tablespace temp1
tempfile 'd:\data\temp1.dbf' size 100m reuse autoextend on next 100m maxsize unlimited
undo tablespace UNDOTBS1
datafile 'd:\data\undo1.dbf' size 100m reuse autoextend on next 100m maxsize unlimited
default tablespace user1
datafile 'd:\data\user1.dbf' size 100m reuse autoextend on next 100m maxsize unlimited
extent management local autoallocate
logfile group 1 'd:\data\redo1.log' size 100m reuse,
group 2 'd:\data\redo2.log' size 100m reuse,
group 3 'd:\data\redo3.log' size 100m reuse
character set al32utf8
user sys identified by oracle
user system identified by oracle
;
create user --´´½¨Êý¾Ý¿âÓû§
create user yangdaliang identified by ydltest default tablespace test_ticket
create tablespace --´´½¨±í¿Õ¼ä
create tablespace test_account
logging
datafile 'D:\oracle\ora92\oradata\test_account.dbf'
size 32m
autoextend on
next 32m maxsize 2048m
extent management local;
create table --´´½¨Êý¾Ý±í
create table ydl_test
(sno number(5) primary key,
sname varchar(20),
saddrvarchar(100)
);
create index --´´½¨Ë÷Òý
Ïà¹ØÎĵµ£º
1£©²»Öª´ó¼ÒÊÇ·ñϲ»¶Ê¹ÓÑNOT IN’ÕâÑùµÄ²Ù×÷£¬Èç¹ûÊÇ£¬ÄǾ¡Á¿Ê¹ÓÃ(NOT) EXISTS Ìæ´ú
2£©ÔÚº£Á¿²éѯʱ¾¡Á¿ÉÙÓøñʽת»»¡£
3£©²éѯº£Á¿Êý¾ÝÊÇ£¬¿ÉÒÔʹÓÃoptimizer['ɔptimaizə] hints£¬ÀýÈç/*+ORDERED */
¾¡Á¿ÉÙÓÃIN²Ù×÷·û£¬»ù±¾ÉÏËùÓеÄIN²Ù×÷·û¶¼¿ÉÒÔÓÃEXISTS´úÌæ¡£
²»ÓÃNOT IN²Ù×÷·û£¬¿ÉÒÔ ......
oracleµ±¶à±íunionʱÓöµ½nvarchar2ÀàÐÍʱ±¨´í ×Ö·û¼¯²»Æ¥Åä
¶ÔʹÓÃnvarcharµÄµØ·½£¬¼ÓÉÏ to_char( nvarchar µÄ±äÁ¿»ò×Ö¶Î )
È磺
select to_char(name),price from aa
union all
select to_char(name),price from bb
3Õűíaa,bb,cc¶¼ÓÐ name price ×Ö¶Î ²éѯ¼Û¸ñ×î¸ßµÄǰ3λÐÕÃû
select * from(select to_ch ......
Oracle IOÎÊÌâ½âÎö
Êý¾Ý¿âµÄ×÷ÓþÍÊÇʵÏÖ¶ÔÊý¾ÝµÄ¹ÜÀíºÍ²éѯ¡£ÈκÎÒ»¸öÊý¾Ý¿âϵͳ£¬±ØÈ»´æÔÚ¶ÔÊý¾ÝµÄ´óÁ¿¶Á»òÕßд»òÕßÁ½ÖвÙ×÷¶¼´óÁ¿´æÔÚ¡£IOÎÊÌâÒ²ÍùÍùÊǵ¼ÖÂÊý¾Ý¿âÐÔÄÜÎÊÌâµÄÖØÒªÔÒò¡£ÔÚÕâÆªÎÄÕÂÖУ¬Ö÷Òª°ïÖú´ó¼ÒÔÚÀí½âOracleµÄ¶Áд²Ù×÷»úÖÆµÄ»ù´¡ÉÏ£¬Áé»î½â¾öÓöµ½µÄ¸÷ÖÖ³£¼ûµÄIOÎÊÌâ¡£
1 OracleÖÐIOµÄ²úÉú
IOµ±È»°üÀ ......
Data Pump ·´Ó³ÁËÕû¸öµ¼³ö/µ¼Èë¹ý³ÌµÄÍêÈ«¸ïС£²»Ê¹Óó£¼ûµÄ SQL ÃüÁ¶øÊÇÓ¦ÓÃר
Óà API£¨direct path api etc) À´ÒÔ¸ü¿ìµÃ¶àµÄËٶȼÓÔØºÍÐ¶ÔØÊý¾Ý¡£
1.Data Pump µ¼³ö expdp
Àý
×Ó£º
sql>create directory dpdata1 as '/u02/ ......
¡¡¡¡Ò»¡¢ÒýÑÔ
¡¡¡¡Êý¾Ý²Ö¿â¼¼ÊõÊÇĿǰÒÑÖªµÄ±È½Ï³ÉÊìºÍ±»¹ã·º²ÉÓõĽâ¾ö·½°¸£¬ÓÃÓÚÕûºÍµçÐÅÔËÓªÆóÒµÄÚ²¿ËùÓзÖÉ¢µÄÔʼҵÎñÊý¾Ý£¬²¢Í¨¹ý±ã½ÝÓÐЧµÄÊý¾Ý·ÃÎÊÊֶΣ¬¿ÉÒÔÖ§³ÖÆóÒµÄÚ²¿²»Í¬²¿ÃÅ£¬²»Í¬ÐèÇ󣬲»Í¬²ã´ÎµÄÓû§ËæÊ±»ñµÃ×Ô¼ºËùÐèµÄÐÅÏ¢¡£Êý¾Ý²Ö¿âϵͳÐèÒªÄܹ»¼°Ê±µØ×·×ٺͷÖÎö´óÁ¿µÄÀúÊ·Êý¾Ý£¬²¢Äܹ»¼°Ê±×ö³ö·ÖÎöºÍÔ¤ ......