orcale系统表查询

数据字典dict总是属于Oracle用户sys的。   
  1、用户:   
   select username from dba_users;   
  改口令   
   alter user spgroup identified by spgtest;    
  2、表空间:   
   select * from dba_data_files;   
   select * from dba_tablespaces;//表空间   
   
   select tablespace_name,sum(bytes), sum(blocks)   
    from dba_free_space group by tablespace_name;//空闲表空间   
   
   select * from dba_data_files   
    where tablespace_name=’RBS’;//表空间对应的数据文件   
   
   select * from dba_segments   
    where tablespace_name=’INDEXS’;   
  3、数据库对象:   
   select * from dba_objects;   
   CLUSTER、DATABASE LINK、FUNCTION、INDEX、LIBRARY、PACKAGE、PACKAGE BODY、   
   PROCEDURE、SEQUENCE、SYNONYM、TABLE、TRIGGER、TYPE、UNDEFINED、VIEW。   
  4、表:   
   select * from dba_tables;   
   analyze my_table compute statistics;->dba_tables后6列   
   select extent_id,bytes from dba_extents   
   where segment_name=’CUSTOMERS’ and segment_type=’TABLE’   
   order by extent_id;//表使用的extent的信息。segment_type=’ROLLBACK’查看回滚段的空间分配信息   
   列信息:   
    select distinct table_name   
    from user_tab_columns   
    where column_name=’SO_TYPE_ID’;   
  5、索引:    
   select * from dba_indexes;//索引,包括主键索引   
   select * from dba_ind_columns;//索引列   
   select i.index_name,i.uniqueness,c.column_name   
    from user_indexes i,user_ind_columns c   
     where i.index_name=c.index_name   
     and i.table_name =’ACC_NBR’;//联接使用   
  6、序列:   
   select * from dba_sequences;   
  7、视图:   
   select * from dba_views;   
   select * from all_views;   
  text 可用于查询视图生成的脚本   
  8、聚簇:   
   select * from dba_clusters;   
  9、快照:   
   select * from dba_snapshots;   
  快照、分区应存在相应的表空间。   
  10、同义词:   
   select * from dba_synonyms   
    where table_owner=’SPGROUP’;   
    //if owner is PUBLIC,then the synonyms is a public synonym.   
     if owner is one of users,then the synonyms is a private synonym.   
  11、数据库链:   
   select * from dba_db_links;   
  在spbase下建数据库链    
   create database link dbl_spnew   
   connect to spnew identified by spnew using ’jhhx’;   
   insert into acc_nbr@dbl_spnew 

 


数据字典dict总是属于Oracle用户sys的。   
  1、用户:   
   select username from dba_users;   
  改口令   
   alter user spgroup identified by spgtest;    
  2、表空间:   
   select * from dba_data_files;   
   select * from dba_tablespaces;//表空间   
   
   select tablespace_name,sum(bytes), sum(blocks)   
    from dba_free_space group by tablespace_name;//空闲表空间   
   
   select * from dba_data_files   
    where tablespace_name=’RBS’;//表空间对应的数据文件   
   
   select * from dba_segments   
    where tablespace_name=’INDEXS’;   
  3、数据库对象:   
   select * from dba_objects;   
   CLUSTER、DATABASE LINK、FUNCTION、INDEX、LIBRARY、PACKAGE、PACKAGE BODY、   
   PROCEDURE、SEQUENCE、SYNONYM、TABLE、TRIGGER、TYPE、UNDEFINED、VIEW。   
  4、表:   
   select * from dba_tables;   
   analyze my_table compute statistics;->dba_tables后6列   
   select extent_id,bytes from dba_extents   
   where segment_name=’CUSTOMERS’ and segment_type=’TABLE’   
   order by extent_id;//表使用的extent的信息。segment_type=’ROLLBACK’查看回滚段的空间分配信息   
   列信息:   
    select distinct table_name   
    from user_tab_columns   
    where column_name=’SO_TYPE_ID’;   
  5、索引:    
   select * from dba_indexes;//索引,包括主键索引   
   select * from dba_ind_columns;//索引列   
   select i.index_name,i.uniqueness,c.column_name   
    from user_indexes i,user_ind_columns c   
     where i.index_name=c.index_name   
     and i.table_name =’ACC_NBR’;//联接使用   
  6、序列:   
   select * from dba_sequences;   
  7、视图:   
   select * from dba_views;   
   select * from all_views;   
  text 可用于查询视图生成的脚本   
  8、聚簇:   
   select * from dba_clusters;   
  9、快照:   
   select * from dba_snapshots;   
  快照、分区应存在相应的表空间。   
  10、同义词:   
   select * from dba_synonyms   
    where table_owner=’SPGROUP’;   
    //if owner is PUBLIC,then the synonyms is a public synonym.   
     if owner is one of users,then the synonyms is a private synonym.   
  11、数据库链:   
   select * from dba_db_links;   
  在spbase下建数据库链    
   create database link dbl_spnew   
   connect to spnew identified by spnew using ’jhhx’;   
   insert into acc_nbr@dbl_spnew 


    where segment_name=’RB1’;   
  比多回滚段状态status,回滚段所属实例instance_num    
  查优化值optimal    
   select n.name,s.optsize   
    from v$rollname n,v$rollstat s   
     where n.usn=s.usn;    
  回滚段中的数据   
   set transaction use rollback segment rb1;/*回滚段名*/   
   select n.name,s.writes   
    from v$rollname n,v$rollstat s    
     where n.usn=s.usn;   
  当事务处理完毕,再次查询$rollstat,比较writes(回滚段条目字节数)差值,可确定事务的大小。   
  查询回滚段中的事务   
   column rr heading ’RB Segment’ format a18   
   column us heading ’Username’ format a15   
   column os heading ’Os User’ format a10   
   column te heading ’Terminal’ format a10   
   select r.name rr,nvl(s.username,’no transaction’) us,s.osuser os,s.terminal te   
    from v$lock l,v$session s,v$rollname r   
     where l.sid=s.sid(+)   
     and trunc(l.id1/65536)=R.USN   
     and l.type=’TX’   
     and l.lmode=6   
   order by r.name;   
  15、作业   
  查询作业信息   
   select job,broken,next_date,interval,what from user_jobs;   
   select job,broken,next_date,interval,what from dba_jobs;   
  查询正在运行的作业   
   select * from dba_jobs_running;   
  使用包exec dbms_job.submit(:v_num,’a;’,sysdate,’sysdate + (10/(24*60*60))’)加入作业。间隔10秒钟   
exec dbms_job.submit(:v_num,’a;’,sysdate,’sysdate + (11/(24*60))’)加入作业。间隔11分钟使用包exec dbms_job.remove(21)删除21号作业。

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