Oracle一些常用的查询命令总结（持续更新）

更新于：2015年1月28日 17:08:13

 1 -------------------------表空间 ---------------------------------------

 2 ----- 查看Oracle当前用户下的信息（用户，表视图，索引，表空间，同义词，存储过程函数，约束条件） 0 、表空间 

 3 select username,default_tablespace from user_users;

 4 -----查看当前用户每个表占用空间的大小

 5 Select Segment_Name,Sum(bytes)/1024/1024 CNT_MB  From User_Extents Group By Segment_Name order by CNT_MB asc;

 6 -----查看表空间的使用率

 7 select tablespace_name,sum(bytes)/1024/1024 CNT_MB from dba_segments group by tablespace_name ORDER BY CNT_MB ASC;

 8 ----查看表空间的存储路径

 9 select t.* from dba_data_files  t;

10 ----查看部门表空间的存储信息

11 select t.tablespace_name,t.file_name,t.status from dba_data_files  t;

12 ------------------------------------------------------------------------------

13 

14 ------------------------------查看用户角色 ----------------------------------

15 ---查看当前用户的角色 

16 select * from user_role_privs;

17 ---查看当前用户的系统权限和表级权限

18 select * from user_sys_privs;

19 select * from user_tab_privs;

20 ---显示当前会话所具有的权限

21 select * from session_privs;

22 ---显示指定用户所具有的系统权限

23 select * from dba_sys_privs where grantee='DBA'; 

24 ---查看用户下所有的表

25 select * from user_tables;

26 ---查看名称包含log字符的表

27 select object_name,object_id from user_objects   where instr(object_name,'LOG')>0;

28 ---查看某表的创建时间

29 select object_name,created from user_objects where object_name=upper('&table_name');

30 ---查看某表的大小

31 select sum(bytes)/(1024*1024) as "size(M)" from user_segments   where segment_name=upper('&table_name'); 

32 ---查看放在ORACLE的内存区里的表

33 select table_name,cache from user_tables where instr(cache,'Y')>0;

34 ------------------------------------------------------------------------------

35 

36 ------------------------------查看索引 -------------------------------------

37 ---查看索引个数和类别

38 select index_name,index_type,table_name from user_indexes order by table_name;

39 ---查看索引被索引的字段 --SYS_C0012355

40 select * from user_ind_columns where index_name=upper('&index_name');

41 ---查看索引的大小 -- SYS_C0012355

42 select sum(bytes)/(1024*1024) as "size(M)" from user_segments where segment_name=upper('&index_name'); 

43 ------------------------------------------------------------------------------

44 

45 ------------------------------查看序列号 和视图 等等 ------------------------

46 ---查看序列号，last_number是当前值 

47 select * from user_sequences; 

48 ---查看视图的名称 

49 select view_name from user_views; 

50 ---查看创建视图的select语句

51 /*set view_name,text_length from user_views;

52 set long 2000; 说明：可以根据视图的text_length值设定set long 的大小*/

53 select text from user_views where view_name=upper('&view_name');

54 ---查看同义词的名称

55 select * from user_synonyms;

56 select * from all_sysnonyms;

57 ---查看某表的约束条件 --APPLICATION_PROJECTS

58 select constraint_name, constraint_type,search_condition, r_constraint_name   from user_constraints where table_name = upper('&table_name');

59 select c.constraint_name,c.constraint_type,cc.column_name   from user_constraints c,user_cons_columns cc    where c.owner = upper('&table_owner') and c.table_name = upper('&table_name')   and c.owner = cc.owner and c.constraint_name = cc.constraint_name   order by cc.position; 

60 ------------------------------------------------------------------------------

61 

62 ------------------------------查看存储函数和过程  ------------------------

63 ---存储函数和过程

64 select object_name,status from user_objects where object_type='FUNCTION';

65 select object_name,status from user_objects where object_type='PROCEDURE';

66 ---查看函数和过程的源代码  --PROC_VER2HOR

67 select text from all_source where owner=user and name=upper('&plsql_name'); 

68 select name from v$datafile;

69 ------------------------------------------------------------------------------

70 

71 ------------------------------查看存储函数和过程  ------------------------

72 select * from v$logfile;

73 select * from v$sqlarea

 更新于：2015年1月28日 17:34:52

Oracle表空间创建：http://zhoualine.iteye.com/blog/1138199