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SQL*Plus: Release 9.2.0.4.0 - Production on Tue Jul 14 18:12:38 2009
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
SQL> conn sys/sys as sysdba
Connected.
SQL> show user
USER is "SYS"
SQL> desc dba_users
Name Null? Type
----------------------------------------- -------- ----------------------------
USERNAME NOT NULL VARCHAR2(30)
USER_ID NOT NULL NUMBER
PASSWORD VARCHAR2(30)
ACCOUNT_STATUS NOT NULL VARCHAR2(32)
LOCK_DATE DATE
EXPIRY_DATE DATE
DEFAULT_TABLESPACE NOT NULL VARCHAR2(30)
TEMPORARY_TABLESPACE&n
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Oracle Êý¾Ý¿âµÄ°ó¶¨±äÁ¿ÌØÐÔ¼°Ó¦ÓÃ
¹Ø¼ü´Ê:
°ó¶¨±äÁ¿(binding variable),¹²Ïí³Ø(shared buffer pool), SGA(system global area);
ÔÚ¿ª·¢Ò»¸öÊý¾Ý¿âϵͳǰ,ÓÐ˶ÔOracle ϵͳÁ˽âºÜ¶à,ÓÈÆäÊÇËüµÄÌØÐÔ,ºÃÏóºÜÉÙ°É;¶Ô³õѧÕßÀ´½²,Õâ¸üÊDz»¿ÉÄܵÄÊÂÇé;½ö½ö¼òµ ......
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CREATE OR REPLACE PROCEDURE sptstr (srcstr varchar2) as
stmp varchar2(2000);
begin &n ......
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CREATE TABLE qq(
qq_num integer
);
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select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
......
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SQL>create table aa(a number);
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SQL> select * from aa;
A
--------
2
SQL>
SQL> insert all
2 into aa values(1)
3 into aa values(2)
4 select * from dual;
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SQL> commit;
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SQL> select * from aa;
A
----------
2
1
2
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S ......