Oracle DBA Á½ÈÕËٳɿγÌ
http://www.oracle.com/technology/global/cn/obe/2day_dba/index.html
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select sess.sid,sess.serial#, lo.oracle_username,lo.os_user_name,ao.object_name,lo.locked_mode
from v$locked_object lo,dba_objects ao,v$session sess
where ao.object_id = lo.object_id
and lo.session_id = sess.sid;
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alter system kill session '273,45';
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SELECT A.OWNER,
A.OBJECT_NAME,
B.XIDUSN,
B.XIDSLOT,
B.XIDSQN,
B.SESSION_ID,
B.ORACLE_USERNAME,
B.OS_USER_NAME,
B.PROCESS,
B.LOCKED_MODE,
C.MACHINE,
C.STATUS,
C.SERVER,
C.SID,
C.SERIAL#,
C.PROGRAM
from ALL_OBJECTS A,
V$LOCKED_OBJECT B,
SYS.GV_$SESSION C
WHERE ( A.OBJE ......
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10 ......
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An explain plan is a representation of the access path that is taken when a query is executed within Oracle.
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At the physical level Oracle reads blocks of data. The smallest amount of data read is a single Oracle block, the largest is con ......
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select job,count(empno) from emp
where job in(select job from emp group by job having min(sal)>1500)
group by job;
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select e.ename,d.dname,m.ename,e.sal,sa. ......