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        Oracle維護(hù)常用SQL語(yǔ)句

        發(fā)布時(shí)間:  2012/9/14 16:32:42

        1、查看表空間的名稱及大小   

          select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size

          from dba_tablespaces t, dba_data_files d

          where t.tablespace_name = d.tablespace_name-
         


          group by t.tablespace_name;
          

          2、查看表空間物理文件的名稱及大小

          select tablespace_name, file_id, file_name,

          round(bytes/(1024*1024),0) total_space

          from dba_data_files

          order by tablespace_name;
          

          3、查看回滾段名稱及大小

          select segment_name, tablespace_name, r.status,

          (initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,

          max_extents, v.curext CurExtent

          From dba_rollback_segs r, v$rollstat v

          Where r.segment_id = v.usn(+)

          order by segment_name ;
          

          4、查看控制文件

          select name from v$controlfile;
          

          5、查看日志文件

          select member from v$logfile;
          

          6、查看表空間的使用情況

          select sum(bytes)/(1024*1024) as free_space,tablespace_name

          from dba_free_space

          group by tablespace_name;
          

          SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,

          (B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"

          FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C

          WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;  

          7、查看數(shù)據(jù)庫(kù)庫(kù)對(duì)象

          select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;  

          8、查看數(shù)據(jù)庫(kù)的版本 

          Select version FROM Product_component_version

          Where SUBSTR(PRODUCT,1,6)='Oracle';

          9、查看數(shù)據(jù)庫(kù)的創(chuàng)建日期和歸檔方式

          Select Created, Log_Mode, Log_Mode From V$Database; 

          10、捕捉運(yùn)行很久的SQL

          column username format a12

          column opname format a16

          column progress format a8

          

          select username,sid,opname,

          round(sofar*100 / totalwork,0)    '%' as progress,

          time_remaining,sql_text

          from v$session_longops , v$sql

          where time_remaining <> 0

          and sql_address = address

          and sql_hash_value = hash_value

          /  

          11、查看數(shù)據(jù)表的參數(shù)信息

          SELECT partition_name, high_value, high_value_length, tablespace_name,

          pct_free, pct_used, ini_trans, max_trans, initial_extent,

          next_extent, min_extent, max_extent, pct_increase, FREELISTS,

          freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,

          empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,

          last_analyzed

          FROM dba_tab_partitions

          --WHERE table_name = :tname AND table_owner = :towner

          ORDER BY partition_position  

          12、查看還沒(méi)提交的事務(wù)

          select * from v$locked_object;

          select * from v$transaction;  

          13、查找object為哪些進(jìn)程所用

          select

          p.spid,

          s.sid,

          s.serial# serial_num,

          s.username user_name,

          a.type object_type,

          s.oSUSEr os_user_name,

          a.owner,

          a.object object_name,

          decode(sign(48 - command),

          1,

          to_char(command), 'Action Code #'    to_char(command) ) action,

          p.program Oracle_process,

          s.terminal terminal,

          s.program program,

          s.status session_status

          from v$session s, v$access a, v$process p

          where s.paddr = p.addr and

          s.type = 'USER' and

          a.sid = s.sid and

          a.object='SUBSCRIBER_ATTR'

          order by s.username, s.oSUSEr   

          14、回滾段查看

          select rownum, sys.dba_rollback_segs.segment_name Name, v$rollstat.extents

          Extents, v$rollstat.rssize Size_in_Bytes, v$rollstat.xacts XActs,

          v$rollstat.gets Gets, v$rollstat.waits Waits, v$rollstat.writes Writes,

          sys.dba_rollback_segs.status status from v$rollstat, sys.dba_rollback_segs,

          v$rollname where v$rollname.name(+) = sys.dba_rollback_segs.segment_name and

          v$rollstat.usn (+) = v$rollname.usn order by rownum  

          15、耗資源的進(jìn)程(top session)

          select s.schemaname schema_name, decode(sign(48 - command), 1,

          to_char(command), 'Action Code #'    to_char(command) ) action, status

          session_status, s.oSUSEr os_user_name, s.sid, p.spid , s.serial# serial_num,

          nvl(s.username, '[Oracle process]') user_name, s.terminal terminal,

          s.program program, st.value criteria_value from v$sesstat st, v$session s , v$processp

          where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'

          or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.oSUSEr asc


         


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