oracle系统命令收藏

0  查看表的结构其中的一种做法:
   select COLUMN_NAME,DATA_TYPE from USER_TAB_COLS where TABLE_NAME='PUB_T_DIVISION_TEST';
  

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_n 

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