下面按類別列出一些ORACLE使用者常用資料字典的查詢使用方法。
一、使用者
查看目前使用者的預設資料表空間
SQL>select username,default_tablespace from user_users;
查看目前使用者的角色
SQL>select * from user_role_privs;
查看目前使用者的系統許可權和表級許可權
SQL>select * from user_sys_privs;
SQL>select * from user_tab_privs;
二、表
查看使用者下所有的表
SQL>select * from user_tables;
查看名稱包含log字元的表
SQL>select object_name,object_id from user_objects where instr(object_name,'LOG')>0;
查看某表的建立時間
SQL>select object_name,created from user_objects where object_name=upper('&table_name');
查看某表的大小
SQL>select sum(bytes)/(1024*1024) as size(M) from user_segments where segment_name=upper('&table_name');
查看放在ORACLE的記憶體區裡的表
SQL>select table_name,cache from user_tables where instr(cache,'Y')>0;
三、索引
查看索引個數和類別
SQL>select index_name,index_type,table_name from user_indexes order by table_name;查看索引被索引的欄位
SQL>select * from user_ind_columns where index_name=upper('&index_name');
查看索引的大小
SQL>select sum(bytes)/(1024*1024) as size(M) from user_segments where segment_name=upper('&index_name');
四、序號
查看序號,last_number是當前值
SQL>select * from user_sequences;
五、視圖
查看視圖的名稱
SQL>select view_name from user_views;
查看建立視圖的select語句
SQL>select view_name,text_length from user_views;
SQL>set long 2000;說明:可以根據視圖的text_length值設定set long 的大小
SQL>select text from user_views where view_name=upper('&view_name');
六、同義字
查看同義字的名稱
SQL>select * from user_synonyms;
七、約束條件
查看某表的約束條件
SQL>select constraint_name, constraint_type,search_condition, r_constraint_name from user_constraints where table_name = upper('&table_name');
SQL>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;
八、儲存函數和過程
查看函數和過程的狀態
SQL>select object_name,status from user_objects where object_type='FUNCTION';
SQL>select object_name,status from user_objects where object_type='PROCEDURE';
查看函數和過程的原始碼
SQL>select text from all_source where owner=user and name=upper('&plsql_name');
九、觸發器
查看觸發器
set long 50000;
set heading off;
set pagesize 2000;
select
'create or replace trigger ' ||
trigger_name || '' || chr(10)||
decode( substr( trigger_type, 1, 1 ),
'A', 'AFTER', 'B', 'BEFORE', 'I', 'INSTEAD OF' ) ||
chr(10) ||
triggering_event || chr(10) ||
'ON ' || table_owner || '.' ||
table_name || '' || chr(10) ||
decode( instr( trigger_type, 'EACH ROW' ), 0, null,
'FOR EACH ROW' ) || chr(10) ,
trigger_body
from user_triggers;