`
thomas0988
  • 浏览: 485153 次
  • 性别: Icon_minigender_1
  • 来自: 南阳
社区版块
存档分类
最新评论

Oracle维护常用SQL语句汇总

 
阅读更多

如何远程判断Oracle数据库的安装平台
  select * from v$version;

  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;

  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、如何远程判断Oracle数据库的安装平台
  select * from v$version;

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、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

  14、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
  /

  15、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

  16、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

17、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

  18、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

  根据sid查是哪台电脑的链接
  column osuser format a15
  column username format a10
  column machine format a30
  select osuser,machine,username,sid,serial# from v$session where sid='128';

  根据sid查对应的sql
  select SID,SQL_TEXT from v$open_cursor where SID='128';

  19、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

  20、查看sga情况
  SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC

  21、查看catched object
  SELECT owner,              name,              db_link,              namespace,
             type,              sharable_mem,              loads,              executions,
            locks,              pins,              kept        FROM v$db_object_cache
         
  22、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

  23、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

  24、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,
  sum(decode(o.type#, 1, NULL, 2, NULL, 3, NULL, 4, NULL, 5, NULL, 6, NULL, 1))
  others   from sys.obj$ o, sys.user$ u   where o.type# >= 1 and    u.user# =
  o.owner# and   u.name <> 'PUBLIC'   group by u.name    order by
  sys.link$ union select 'CONSTRAINT' , count(*) from sys.con$

25、有关connection的相关信息
  1)查看有哪些用户连接
  select s.osuser os_user_name,    decode(sign(48 - command), 1, to_char(command),
  'Action Code #' || to_char(command) ) action,     p.program oracle_process,  
  status session_status,    s.terminal terminal,    s.program program,  
  s.username user_name,    s.fixed_table_sequence activity_meter,    '' query,  
  0 memory,    0 max_memory,     0 cpu_usage,    s.sid,   s.serial# serial_num  
  from v$session s,    v$process p   where s.paddr=p.addr and    s.type = 'USER'
  order by s.username, s.osuser

  2)根据v.sid查看对应连接的资源占用等情况
  select n.name,
   v.value,
   n.class,
   n.statistic#
  from  v$statname n,
   v$sesstat v
  where v.sid = 71 and
   v.statistic# = n.statistic#
  order by n.class, n.statistic#

  3)根据sid查看对应连接正在运行的sql
  select /*+ PUSH_SUBQ */
   command_type,
   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,
   sysdate start_time,
   sysdate finish_time,
   '>' || address sql_address,
   'N' status
  from v$sqlarea
  where address = (select sql_address from v$session where sid = 71)

  26、查询表空间使用情况
  select a.tablespace_name "表空间名称",
  100-round((nvl(b.bytes_free,0)/a.bytes_alloc)*100,2) "占用率(%)",
  round(a.bytes_alloc/1024/1024,2) "容量(M)",
  round(nvl(b.bytes_free,0)/1024/1024,2) "空闲(M)",
  round((a.bytes_alloc-nvl(b.bytes_free,0))/1024/1024,2) "使用(M)",
  Largest "最大扩展段(M)",
  to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') "采样时间"
  from  (select f.tablespace_name,
     sum(f.bytes) bytes_alloc,
     sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) maxbytes
  from dba_data_files f
  group by tablespace_name) a,
  (select  f.tablespace_name,
      sum(f.bytes) bytes_free
  from dba_free_space f
  group by tablespace_name) b,
  (select round(max(ff.length)*16/1024,2) Largest,
     ts.name tablespace_name
  from sys.fet$ ff, sys.file$ tf,sys.ts$ ts
  where ts.ts#=ff.ts# and ff.file#=tf.relfile# and ts.ts#=tf.ts#
  group by ts.name, tf.blocks) c
  where a.tablespace_name = b.tablespace_name and a.tablespace_name = c.tablespace_name

27、查询表空间的碎片程度
  select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name
  having count(tablespace_name)>10;

  alter tablespace name coalesce;
  alter table name deallocate unused;

  create or replace view ts_blocks_v as
  select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space
  union all
  select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;

  select * from ts_blocks_v;

  select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space
  group by tablespace_name;

  28、查询有哪些数据库实例在运行
  select inst_name from v$active_instances;

  29、查找oracle性能瓶颈sql
  select sql_text,spid,v$session.program,process from
  v$sqlarea,v$session,v$process
  where v$sqlarea.address=v$session.sql_address
  and v$sqlarea.hashvalue=v$session.sql_hash_value
  and v$session.paddr=v$process.addr
  and v$process.spid in (操作系统PID);

  select sid,event,p1,p1text from v$session_wait;

  30、 找出最耗资源的sql
  select * from v$process where spid='2796';
  select sql_hash_value,machine,username,program from v$session where PAddr='63B7A584';
  select * from v$sqltext where hashvalue='833203018';
  select * from v$sql where hashvalue='833203018';
  select * from v$sqlarea where hashvalue='833203018';

  SELECT a.username,a.machine,a.program,a.sid,a.serial#,a.status,c.piece,c.sql_text FROM v$session a,v$process b,v$sqltext c WHERE b.spid='2796' AND b.addr=a.paddr AND a.sql_address=c.address(+) ORDER BY c.piece要找出最耗资源的sql,我们可以首先使用top等工具,找到最好资源的进程(记住进程号),例如,操作系统进程号为2796,然后根据这个进程号(v$process.spid)在v$process中找到进程地址(v$process.addr),然后根据这个地址在 v$session中找到相应的sid(v$session.sid),然后根据这个sid找到相应的hash alue(v$session. sql_hash_value),然后根据这个hash alue在v$sqltext,$sql,v$sqlarea等视图中找到对应的sql语句(sql_text)。

  select * from v$process where spid='2796';
  select sql_hash_value,machine,username,program from v$session where PAddr='63B7A584';
  select * from v$sqltext where hashvalue='833203018';
  select * from v$sql where hashvalue='833203018';
  select * from v$sqlarea where hashvalue='833203018';

  SELECT a.username,a.machine,a.program,a.sid,a.serial#,a.status,c.piece,c.sql_text FROM v$session a,v$process b,v$sqltext c WHERE b.spid='2796' AND b.addr=a.paddr AND a.sql_address=c.address(+) ORDER BY c.piece

分享到:
评论
1 楼 lancezhcj 2012-04-25  
太好了,谢谢博主分享

相关推荐

    oracle常用SQL语句(汇总版).docx

    Oracle 常用 SQL 语句汇总 Oracle 是一个功能强大且复杂的关系数据库管理系统,它提供了多种 SQL 语句来管理和操作数据库。在本文中,我们将详细介绍 Oracle 中常用的 SQL 语句,包括数据控制语句(DML)、数据定义...

    Oracle维护常用SQL语句

    ### Oracle维护常用SQL语句详解 #### 一、查看表空间的名称及大小 **SQL语句:** ```sql select t.tablespace_name, round(sum(bytes/(1024*1024)), 0) ts_size from dba_tablespaces t, dba_data_files d where t....

    oracle常用SQL语句(汇总版).zip

    本文件"oracle常用SQL语句(汇总版)"将对Oracle中的常用SQL语法进行详尽阐述。 1. 数据查询: - `SELECT`语句:这是SQL中最基本的查询语句,用于从表中检索数据。例如,`SELECT * FROM 表名;`将返回表中的所有记录...

    工作中oracle常用总结SQL语句汇总

    ### 工作中Oracle常用SQL语句汇总及解析 在日常工作中,我们经常会遇到需要查询、维护Oracle数据库的情况。为了方便快速地回顾和使用这些常用的SQL语句,本篇文章将对一些重要的Oracle SQL命令进行归纳总结,并对其...

    oracle常用操作SQL语句

    汇总oracle一些常用SQL语句,比如:用户解锁、修改用户密码、锁表、视图恢复、定时任务、物化视图、触发器、带参游标、常用函数、执行计划、字符串/时间各种运算、HTTP请求、SQL优化等

    ORACLE数据库优化之SQL语句的并行处理.pdf

    ### ORACLE数据库优化之SQL语句的并行处理 #### SQL语句并行处理的重要性与优势 在现代信息系统的高效运作中,数据库的性能优化至关重要,尤其是面对大规模数据集时。Oracle数据库作为企业级数据库解决方案的佼佼...

    ORACLE__SQL语句教学

    ### ORACLE SQL语句教学 #### 一、概述 Oracle SQL是用于管理Oracle数据库的一种标准结构化查询语言。本文档旨在为初学者提供一个全面且易于理解的学习指南,重点介绍Oracle SQL中最常用的SELECT语句的基本用法。...

    初学者常用Oracle sql语句

    ### 初学者常用Oracle SQL语句详解 #### 一、查询表名 在Oracle数据库中,根据不同的权限和需求,可以使用以下几种方法来查询表名: 1. **查询当前用户所拥有的表:** ```sql SELECT table_name, tablespace_...

    Oracle sql语句优化规则汇总

    ### Oracle SQL语句优化规则详解 #### 一、选择正确的优化器 在Oracle数据库中,SQL语句的执行效率很大程度上取决于所选的优化器。Oracle提供了三种优化器模式: 1. **基于规则的优化器(RULE)**:这是Oracle...

    Oracle经典SQL语句

    ORACLE经典语句汇总 -- 字符串左填充和右填充,默认填充空格 -- 产生1~99行数据,少于一位则补0 -- 刪除相同行 -- 随机数 -- 产生业务流水号 -- 查询某张表中有哪些字段 -- 自循环表中 由叶子节点查父节点 -- 查子...

    Oracle常用语句-总结文档汇总

    "Oracle常用语句-总结文档汇总"提供了丰富的资源,涵盖了SQL语句的基础到进阶应用,包括列行转换、SQL性能优化等多个关键知识点。 首先,列行转换是数据处理中常见的需求,Oracle提供了多种方法来实现这一操作。...

    oracle 数据处理sql语句源码

    本资源包“oracle 数据处理sql语句源码”可能包含了这些关键元素的具体实现,为监测项目的数据处理提供了有效的工具。 首先,我们来看看“PROC”或存储过程。存储过程是预编译的SQL语句集合,它们可以作为一个单元...

    oracle常用sql整理

    本文将基于"oracle常用sql整理"的主题,深入探讨Oracle SQL的一些核心概念、语句及其实用技巧,适合初级到中级水平的学习者。 一、SQL基础 SQL是标准化的查询语言,分为DDL(Data Definition Language)、DML(Data...

Global site tag (gtag.js) - Google Analytics