科技行者

行者学院 转型私董会 科技行者专题报道 网红大战科技行者

知识库

知识库 安全导航

至顶网软件频道Oracle 常用SQL查询列表

Oracle 常用SQL查询列表

  • 扫一扫
    分享文章到微信

  • 扫一扫
    关注官方公众号
    至顶头条

  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

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

  • 评论
  • 分享微博
  • 分享邮件

  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
  
  14。回滚段查看
  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。耗资源的进程(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$process p  
  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
  
  16。查看锁(lock)情况
  select /*+ RULE */ ls.osuser os_user_name,  ls.username user_name, 
  decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX', 
  'Transaction enqueue lock', 'UL', 'User supplied lock') lock_type, 
  o.object_name object,  decode(ls.lmode, 1, null, 2, 'Row Share', 3, 
  'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null) 
  lock_mode,  o.owner,  ls.sid,  ls.serial# serial_num,  ls.id1,  ls.id2  
  from sys.dba_objects o, (  select s.osuser,  s.username,  l.type,  
  l.lmode,  s.sid,  s.serial#,  l.id1,  l.id2  from v$session s,  
  v$lock l  where s.sid = l.sid ) ls where o.object_id = ls.id1 and  o.owner 
  <> 'SYS'  order by o.owner, o.object_name
  
  17。查看等待(wait)情况
  SELECT v$waitstat.class, v$waitstat.count count, SUM(v$sysstat.value) sum_value 
  FROM v$waitstat, v$sysstat WHERE v$sysstat.name IN ('db block gets', 
  'consistent gets') group by v$waitstat.class, v$waitstat.count
  
  18。查看sga情况
  SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC
  
  19。查看catched object
  SELECT owner,       name,       db_link,       namespace, 
        type,       sharable_mem,       loads,       executions,  
        locks,       pins,       kept    FROM v$db_object_cache
        
  20。查看V$SQLAREA
  SELECT SQL_TEXT, SHARABLE_MEM, PERSISTENT_MEM, RUNTIME_MEM, SORTS, 
  VERSION_COUNT, LOADED_VERSIONS, OPEN_VERSIONS, USERS_OPENING, EXECUTIONS, 
  USERS_EXECUTING, LOADS, FIRST_LOAD_TIME, INVALIDATIONS, PARSE_CALLS, DISK_READS,
   BUFFER_GETS, ROWS_PROCESSED FROM V$SQLAREA
   
  21。查看object分类数量
  select decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 , 
  'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity from 
  sys.obj$ o where o.type# > 1 group by decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 
  , 'CLUSTER' , 4, 'VIEW' , 5 , 'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) union select 
  'COLUMN' , count(*) from sys.col$ union select 'DB LINK' , count(*) from 
  
  22。按用户查看object种类
  select u.name schema,  sum(decode(o.type#, 1, 1, NULL)) indexes, 
  sum(decode(o.type#, 2, 1, NULL)) tables,  sum(decode(o.type#, 3, 1, NULL)) 
  clusters,  sum(decode(o.type#, 4, 1, NULL)) views,  sum(decode(o.type#, 5, 1, 
  NULL)) synonyms,  sum(decode(o.type#, 6, 1, NULL)) sequences, 

查看本文来源

    • 评论
    • 分享微博
    • 分享邮件