Oracle一些經常使用的查詢命令總結（持續更新）

更新於：2015年1月28日 17:08:13

 1 -------------------------表空間 ---------------------------------------
 2 ----- 查看Oracle當前用戶下的信息（用戶，表視圖，索引，表空間，同義詞，存儲過程函數，約束條件） 0 、表空間 
 3 select username,default_tablespace from user_users;
 4 -----查看當前用戶每一個表佔用空間的大小
 5 Select Segment_Name,Sum(bytes)/1024/1024 CNT_MB  From User_Extents Group By Segment_Name order by CNT_MB asc;
 6 -----查看錶空間的使用率
 7 select tablespace_name,sum(bytes)/1024/1024 CNT_MB from dba_segments group by tablespace_name ORDER BY CNT_MB ASC;
 8 ----查看錶空間的存儲路徑
 9 select t.* from dba_data_files  t;
10 ----查看部門表空間的存儲信息
11 select t.tablespace_name,t.file_name,t.status from dba_data_files  t;
12 ------------------------------------------------------------------------------
13 
14 ------------------------------查看用戶角色 ----------------------------------
15 ---查看當前用戶的角色 
16 select * from user_role_privs;
17 ---查看當前用戶的系統權限和表級權限
18 select * from user_sys_privs;
19 select * from user_tab_privs;
20 ---顯示當前會話所具備的權限
21 select * from session_privs;
22 ---顯示指定用戶所具備的系統權限
23 select * from dba_sys_privs where grantee='DBA'; 
24 ---查看用戶下全部的表
25 select * from user_tables;
26 ---查看名稱包含log字符的表
27 select object_name,object_id from user_objects   where instr(object_name,'LOG')>0;
28 ---查看某表的建立時間
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的內存區裏的表
33 select table_name,cache from user_tables where instr(cache,'Y')>0;
34 ------------------------------------------------------------------------------
35 
36 ------------------------------查看索引 -------------------------------------
37 ---查看索引個數和類別
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 ------------------------------查看序列號 和視圖 等等 ------------------------
46 ---查看序列號，last_number是當前值 
47 select * from user_sequences; 
48 ---查看視圖的名稱 
49 select view_name from user_views; 
50 ---查看建立視圖的select語句
51 /*set view_name,text_length from user_views;
52 set long 2000; 說明：能夠根據視圖的text_length值設定set long 的大小*/
53 select text from user_views where view_name=upper('&view_name');
54 ---查看同義詞的名稱
55 select * from user_synonyms;
56 select * from all_sysnonyms;
57 ---查看某表的約束條件 --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 ------------------------------查看存儲函數和過程  ------------------------
63 ---存儲函數和過程
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 ---查看函數和過程的源代碼  --PROC_VER2HOR
67 select text from all_source where owner=user and name=upper('&plsql_name'); 
68 select name from v$datafile;
69 ------------------------------------------------------------------------------
70 
71 ------------------------------查看存儲函數和過程  ------------------------
72 select * from v$logfile;
73 select * from v$sqlarea

 更新於：2015年1月28日 17:34:52

Oracle表空間建立：http://zhoualine.iteye.com/blog/1138199