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至顶网软件频道数据库手册:Oracle维护常用SQL语句

数据库手册:Oracle维护常用SQL语句

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  1、查看表空间的名称及大小      select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size      from dba_tablespaces t, dba_data_

作者:中国IT实验室 来源:中国IT实验室 2007年9月30日

关键字: SQL 数据库 ORACLE

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  1、查看表空间的名称及大小
  
  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、查看表空间物理文件的名称及大小
  
  select tablespace_name, file_id, file_name,
  
  round(bytes/(1024*1024),0) total_space
  
  from dba_data_files
  
  order by tablespace_name;
  
  3、查看回滚段名称及大小
  
  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、查看表空间的使用情况
  
  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、查看数据库库对象
  
  select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
  
  8、查看数据库的版本
  
  Select version FROM Product_component_version
  
  Where SUBSTR(PRODUCT,1,6)='Oracle';
  
  9、查看数据库的创建日期和归档方式
  
  Select Created, Log_Mode, Log_Mode From V$Database;
  
  10、捕捉运行很久的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、查看数据表的参数信息
  
  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、查看还没提交的事务
  
  select * from v$locked_object;
  
  select * from v$transaction;
  
  13、查找object为哪些进程所用
  
  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

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