查看當(dāng)前用戶的缺省表空間
SQL>select username,default_tablespace from user_users;
查看當(dāng)前用戶的角色
SQL>select * from user_role_privs;
查看當(dāng)前用戶的系統(tǒng)權(quán)限和表級(jí)權(quán)限
SQL>select * from user_sys_privs;
SQL>select * from user_tab_privs;
查看用戶下所有的表
SQL>select * from user_tables;
顯示用戶信息(所屬表空間)
select default_tablespace,temporary_tablespace
from dba_users where username='GAME';
1、用戶
查看當(dāng)前用戶的缺省表空間
SQL>select username,default_tablespace from user_users;
查看當(dāng)前用戶的角色
SQL>select * from user_role_privs;
查看當(dāng)前用戶的系統(tǒng)權(quán)限和表級(jí)權(quán)限
SQL>select * from user_sys_privs;
SQL>select * from user_tab_privs;
顯示當(dāng)前會(huì)話所具有的權(quán)限
SQL>select * from session_privs;
顯示指定用戶所具有的系統(tǒng)權(quán)限
SQL>select * from dba_sys_privs where grantee='GAME';
顯示特權(quán)用戶
select * from v$pwfile_users;
顯示用戶信息(所屬表空間)
select default_tablespace,temporary_tablespace
from dba_users where username='GAME';
顯示用戶的PROFILE
select profile from dba_users where username='GAME';
2、表
查看用戶下所有的表
SQL>select * from user_tables;
查看名稱包含log字符的表
SQL>select object_name,object_id from user_objects
where instr(object_name,'LOG')>0;
查看某表的創(chuàng)建時(shí)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的內(nèi)存區(qū)里的表
SQL>select table_name,cache from user_tables where instr(cache,'Y')>0;
3、索引
查看索引個(gè)數(shù)和類別
SQL>select index_name,index_type,table_name from user_indexes order by table_name;
查看索引被索引的字段
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');
4、序列號(hào)
查看序列號(hào)，last_number是當(dāng)前值
SQL>select * from user_sequences;
5、視圖
查看視圖的名稱
SQL>select view_name from user_views;
查看創(chuàng)建視圖的select語句
SQL>set view_name,text_length from user_views;
SQL>set long 2000; 說明：可以根據(jù)視圖的text_length值設(shè)定set long 的大小
SQL>select text from user_views where view_name=upper('&view_name');
6、同義詞
查看同義詞的名稱
SQL>select * from user_synonyms;
7、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;
8、存儲(chǔ)函數(shù)和過程
查看函數(shù)和過程的狀態(tài)
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(shù)和過程的源代碼
SQL>select text from all_source where owner=user and name=upper('&plsql_name');
--------------------------------------------------oracle 查詢 表字段 以及字段 數(shù)據(jù)類型 -----------------------------------------
第一種
select cname from col where tname='EMP';
第二種
select column_name from user_tab_columns where table_name='EMP';
介紹 如果查詢數(shù)據(jù)的 字段數(shù)據(jù)類型
select data_type from user_tab_columns where table_name='EMP';
兩個(gè)一起查
select data_type,column_name from user_tab_columns where table_name='EMP';
--------------------------------------------查詢 字段注釋---------------------------------------------
select * from user_col_comments ;//所有的注釋
select * from user_col_comments where table_name='你的表(emp)' ;//指定表的注釋