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1.USEREVN()
·µ»Øµ±Ç°Óû§»·¾³µÄÐÅÏ¢,opt¿ÉÒÔÊÇ:
ENTRYID,SESSIONID,TERMINAL,ISDBA,LABLE,LANGUAGE,CLIENT_INFO,LANG,VSIZE
1.ISDBA   ²é¿´µ±Ç°Óû§ÊÇ·ñÊÇDBAÈç¹ûÊÇÔò·µ»Øtrue
SQL> select userenv('isdba') from dual;
USEREN
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FALSE
2.SESSION ·µ»Ø»á»°±êÖ¾
SQL> select userenv('sessio ......

oracle±í¿Õ¼ä²Ù×÷

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CREATE TABLESPACE data01
DATAFILE 'D:\oracle\ora92\oradata\db\DATA01.dbf' SIZE 200M
UNIFORM SIZE 128k;
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CREATE TEMPORARY TABLESPACE temp_data
TEMPFILE 'D:\TEMP_DA ......

oracleÓû§È¨Ï޵IJéѯ

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1.²é¿´ËùÓÐÓû§£º
  select * from dba_users;
  select * from all_users;
  select * from user_users;
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  select * from dba_sys_privs;
  select * from user_sys_privs;
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oracle CursorʹÓôóÈ«

ʹÓÃCursor:
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declare
RoomID Room.RoomID%Type;
RoomName Room.RoomName%Type;
cursor crRoom is
select RoomID,RoomName
from Room;
begin
open crRoom;loop;
fetch crRoom into RoomID,RoomName;
exit when crRoom%notFound;
end loop;
close crRoom;
end;
& ......
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