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S: use mydatabase
O: connect username/password@DBAlias
conn username/password@DBAlias 2. ÔÚOracleÖÐʹÓÃDual, DualÊÇOracleÒ»¸öÌØÓеÄÐéÄâ±í, OracleÖкܶàϵͳµÄ±äÁ¿ºÍº¯Êý¶¼¿ÉÒÔͨ¹ýDualÖлñµÃ
S: select getdate();
O: select sysdate from dual; 3. Select IntoºÍInsert Óï¾äµÄʹÓÃ, ÔÚSQL ServerÖеÄSelect IntoÓï¾äÔÚOracleÖÐÒ»°ãÊÇInsert into¡select¡, ÁíÍâ2¸öÊý¾Ý¿â¶¼Ö§³Ö±ê×¼µÄSQL, д·¨ÉÏÂÔÓÐÇø±ð
S: select getdate() mycolumn into mytable;
Insert mytable values(¡®more text¡¯);
O: insert into mytable select getdate() mycolumn from dual
insert into mytable (mycolumn) values(sysdate); 4. UpdateÓï¾ä
S: update mytable set mycolumn=myothertable.mycolumn
from mytable,myothertable
where mytable.mycolumn like 'MY%' and myothertable.myothercolumn='some text';
O: update mytable set mycolumn=
(select a.mycolumn from myothertable a
where myothertable.myothercolumn='some text')
where mytable.mycolumn like 'MY%'; 5. DeleteÓï¾ä
S: delete mytable where mycolumn like 'some%';
O: delete from mytable where mycolumn like 'some%'; 6. ʹÓÿª·¢¹ÜÀíµÄÈí¼þ
S: isql
osql: for queries developed in SQL Analyzer
SQL Server Management Studio Express ͼÐλ¯¹ÜÀí¹¤¾ß
O: sqlplus
PL/SQL Developer ͼÐλ¯¿ª·¢¹ÜÀí¹¤¾ß
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SQL*Loader: Release 8.1.6.0.0 - Production on ÐÇÆÚ¶þ 1ÔÂ 8 11:06:42 2 ......
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Wait Problem Potential Fix Sequential Read Indicates many index reads—tune the code (especially joins) Scattered Read Indicates many full table scans—tune the code; cache small tables ......
[root@vmfs sysconfig]# lvdisplay |grep db_d
LV Name /dev/db_v4/db_d_22
LV Name /dev/db_v4 ......
--´´½¨±í¿Õ¼ä
create tablespace Ãû³Æ
(
datafile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨ÁÙʱ±í¿Õ¼ä
create temporary tablespace Ãû³Æ
(
tempfile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨Óû§
create user Óû§Ãû idtenified by ÃÜÂë
/
--ΪÓû§Ö¸¶¨ ......