数据库管理员日常工作中必备的sql列表 （2）

    来源：赛迪网    作者：Alice

--求session的OS进程ID

col program format a54

select p.spid "OS Thread", b.name "Name-User", s.program

from v$process p, v$session s, v$bgprocess b

where p.addr = s.paddr and p.addr = b.paddr

UNION ALL

select p.spid "OS Thread", s.username "Name-User", s.program

from v$process p, v$session s where p.addr = s.paddr and s.username is not null;

--查会话的阻塞

col user_name format a32

select /*+ rule */ lpad(' ',decode(l.xidusn ,0,3,0))||l.oracle_username user_name, o.owner,o.object_name,s.sid,s.serial#

from v$locked_object l,dba_objects o,v$session s

where l.object_id=o.object_id and l.session_id=s.sid order by o.object_id,xidusn desc ;

col username format a15

col lock_level format a8

col owner format a18

col object_name format a32

select /*+ rule */ s.username, decode(l.type,'tm','table lock', 'tx','row lock', null) lock_level, o.owner,o.object_name,s.sid,s.serial#

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 ;

--求等待的事件及会话信息/求会话的等待及会话信息

select se.sid,s.username,se.event,se.total_waits,se.time_waited,se.average_wait

from v$session s,v$session_event se

where s.username is not null and se.sid=s.sid and s.status='ACTIVE' and se.event not like '%SQL*Net%' order by s.username;

select s.sid,s.username,sw.event,sw.wait_time,sw.state,sw.seconds_in_wait

from v$session s,v$session_wait sw

where s.username is not null and sw.sid=s.sid and sw.event not like '%SQL*Net%' order by s.username;

--求会话等待的file_id/block_id

col event format a24

col p1text format a12

col p2text format a12

col p3text format a12

select sid,event,p1text, p1, p2text, p2, p3text, p3

from v$session_wait

where event not like '%SQL%' and event not like '%rdbms%' and event not like '%mon%' order by event;

select name,wait_time from v$latch l where exists (select 1 from (select sid,event,p1text, p1, p2text, p2, p3text, p3

from v$session_wait

where event not like '%SQL%' and event not like '%rdbms%' and event not like '%mon%'

) x where x.p1= l.latch#);

--求会话等待的对象

col owner format a18

col segment_name format a32

col segment_type format a32

select owner,segment_name,segment_type

from dba_extents

where file_id = &file_id and &block_id between block_id and block_id + blocks - 1;

--求buffer cache中的块信息

select o.OBJECT_TYPE, substr(o.OBJECT_NAME,1,10) objname , b.objd , b.status, count(b.objd)

from v$bh b, dba_objects o

where b.objd = o.data_object_id and o.owner = '&1' group by o.object_type, o.object_name,b.objd, b.status ;

--求日志文件的空间使用

select le.leseq current_log_sequence#, 100*cp.cpodr_bno/le.lesiz percentage_full

from x$kcccp cp,x$kccle le

where le.leseq =cp.cpodr_seq;

--求等待中的对象

select /*+rule */ s.sid, s.username, w.event, o.owner, o.segment_name, o.segment_type,

o.partition_name, w.seconds_in_wait seconds, w.state

from v$session_wait w, v$session s, dba_extents o

where w.event in (select name from v$event_name where parameter1 = 'file#'

and parameter2 = 'block#' and name not like 'control%')

and o.owner <> 'sys' and w.sid = s.sid and w.p1 = o.file_id and w.p2 >= o.block_id and w.p2 < o.block_id + o.blocks

--求当前事务的重做尺寸

select value

from v$mystat, v$statname

where v$mystat.statistic# = v$statname.statistic# and v$statname.name = 'redo size';

--唤醒smon去清除临时段

column pid new_value Smon

set termout off

select p.pid from sys.v_$bgprocess b,sys.v_$process p where b.name = 'SMON' and p.addr = b.paddr

/

set termout on

oradebug wakeup &Smon

undefine Smon

--求回退率

select b.value/(a.value + b.value),a.value,b.value from v$sysstat a,v$sysstat b

where a.statistic#=4 and b.statistic#=5;

--求DISK READ较多的SQL

select st.sql_text from v$sql s,v$sqltext st

where s.address=st.address and s.hash_value=st.hash_value and s.disk_reads > 300;

--求DISK SORT严重的SQL

select sess.username, sql.sql_text, sort1.blocks

from v$session sess, v$sqlarea sql, v$sort_usage sort1

where sess.serial# = sort1.session_num

and sort1.sqladdr = sql.address

and sort1.sqlhash = sql.hash_value and sort1.blocks > 200;

--求对象的创建代码

column column_name format a36

column sql_text format a99

select dbms_metadata.get_ddl('TABLE','&1') from dual;

select dbms_metadata.get_ddl('INDEX','&1') from dual;

--求表的索引

set linesize 131

select a.index_name,a.column_name,b.status, b.index_type

from user_ind_columns a,user_indexes b

where a.index_name=b.index_name and a.table_name='&1';

求索引中行数较多的

select index_name,blevel,num_rows,CLUSTERING_FACTOR,status from user_indexes where num_rows > 10000 and blevel > 0

select table_name,index_name,blevel,num_rows,CLUSTERING_FACTOR,status from user_indexes where status <> 'VALID'

--求当前会话的SID，SERIAL#

select sid, serial# from v$session where audsid = SYS_CONTEXT('USERENV','SESSIONID');

--求表空间的未用空间

col mbytes format 9999.9999

select tablespace_name,sum(bytes)/1024/1024 mbytes from dba_free_space group by tablespace_name;

--求表中定义的触发器

select table_name,index_type,index_name,uniqueness from user_indexes where table_name='&1';

select trigger_name from user_triggers where table_name='&1';

--求未定义索引的表

select table_name from user_tables where table_name not in (select table_name from user_ind_columns);

--执行常用的过程

exec print_sql('select count(*) from tab');

exec show_space2('table_name');

--求free memory

select * from v$sgastat where name='free memory';

select a.name,sum(b.value) from v$statname a,v$sesstat b where a.statistic# = b.statistic# group by a.name;