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SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
from v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null
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char(n)
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varchar2(n)
n=1 to 4000×Ö½Ú
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--ɾ³ýij¸öÓû§ÏµĶÔÏó   
set heading off;   
set feedback off;   
spool c:\dropobj.sql;   
  prompt --Drop constraint   
 select 'alter t ......

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SQL> Select to_char(sysdate,'Y') from dual;
TO_CHAR(SYSDATE,'Y')
--------------------
7
SQL> Select to_char(sysdate,'YY') from dual;
TO_CHAR(SYSDATE,'YY')
---------------------
07 ......

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CREATE TEMPORARY TABLESPACE Test_temp
TEMPFILE 'E:\Test\TEST_temp.dbf'
SIZE 32M
AUTOEXTEND ON
NEXT 32M MAXSIZE 2048M
EXTENT MANAGEMENT LOCAL;
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create tablespace TEST
datafile 'E:\TEST\TEST.dbf'
size  100M
autoextend on maxsize     ......
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